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Title: Sick Koi
Description: Koi has red tail and fins

moran439 - March 4, 2012 06:17 PM (GMT)
Hi Robyn,
I have a 6800 gallon pond that I have had for 5 years now. I had problems the first year I owned it but in the last 4 years things have been pretty good and I have not had too much problems with water quality.

I don't know if this year the problems I am having are due to the unusually mild winter we had but now my pond is pea soup green and I just noticed today that one of my most favorite of all my koi's has a red tail and fins. :-(

I am here in Connecticut and the pond temperature here has been flucuating quite a bit. I have gone from 32 on the coldes of days all the way up to 43 degrees on the days that we have had temps in the high 50's.

My question is, would it be too early to place a pump and uv in the pond to start the water cirulating given that the fish is sick? and could I do a partial water change? The temperature of the water today is 36 degrees. It is supposed to go down into the twenties for the next couple of nights but low 40's during the day, and then by end of week back up into the high 50's.

Since I cannot see most of the fish due to green water, I don't want to do something that might cause further undue stress.


Robyn - March 5, 2012 04:37 PM (GMT)
Welcome back to the forum Claudette!

I'm sorry that your koi are ill. You have a nice sized koi pond!

Yes, I think the mild winter will certainly bring on the green suspended algae faster and stronger. If you get the UV going, that will soon take care of the green water. It is probably safe to set the system back up because of the mild winter and early spring. Even if the pond water goes down to freezing, the moving water in the filter system won't freeze. I would wait though until the next two cold nights pass. I keep my main pump and waterfall going all winter in Zone 6/7. You're in a colder area so it was best to turn those off. Do you keep aeration going though in the winter? I think getting your pond's pump and filter system will do the most good for the pond. It's the circulation system, and heart of the pond.

You can do partial water changes any time of the year. It's a bit hard to do, of course, when the pond is frozen but I continue to add water in the winter to keep the pond topped off. This year, my pond didn't even freeze since it was so warm. A water change would be a good idea. Is your tap or well water cold? In the winter, our well water is pretty cold so there's not much of a temperature shock. If you only change say 10 to 30%, and the tap water is not more than 20 degrees F warmer than the pond water, the fish probably won't even notice the temperature change. Hopefully, they'll notice the more refreshing water.

The red streaks on the fins of koi are pretty common in the spring. My koi get a little bit of it; it's mild septicemia brought on by the changing water temperatures and ubiquotous pathogens in the pond. When this starts to happen (in March but early this year), I add some pond salt and KoiZyme. I suggest using those if you're not already. Turning the UV back on as soon as you're sure the pond's filter system lines aren't going to freeze will also help reduce the pathogen (mostly bacteria and some fungus) load in the early spring.

If the red streaks are severe, the fish may be under attack from bacteria. The KoiZyme and salt help with that. The next step up in treatment would be MelaFix (and PimaFix if fungus are involved) which are all natural and then finally the strong antibiotics. In your pond, it would be super expensive to add medications to the water. If you have access to a koi vet, you could have them injected with antibiotics. Hopefully, you're only seeing the mild streaks and no major behavioral changes. As soon as the water temperature goes in to the 50's degrees F, start to feed them a wheat-germ based koi food and/or Cheerios. Getting food in their system will help them gain strength. This time of the year, the temperatures go up and down quite a bit so I am deciding whether or not to feed the fish based on the day to day conditions. My fish in MD are getting fed about three times a week now but we're expecting a warm week so they will probably be getting daily Cheerios and spring pond food.

Good luck!

moran439 - March 6, 2012 01:44 AM (GMT)
Hi Robyn,
Thank you for getting back to me. I have been coming to your site weekly since I became a member back in 2008 but I just have not had time to post here. We (my hubby and I who constantly say's I have a mouse in my pocket :P ) have done some extensive work in our backyard...five years in the making. I believe we should be done this year! Yeah! I can't wait to just sit back and enjoy the yard and pond now.

Now to business...yes I do keep aeration going through the winter. We usually shut the pump off at the end of November and keep the net on until the first snow fall so that the frame and net do not collapse into the pond from the weight of the snow. I do a good cleaning in the fall and add fall/winter bacteria, but once the net comes off the water quality starts to go down hill fast. This year it has been worse than ever. I have not experienced red streaks on my koi in the past years, but this year it is bad. I am so worried that I may lose a lot of my beautiful finny friends. I just love these little guys!

I did add salt in the fall and plan on adding Koizyme, but I want to wait until I have additional aeration going on first. As soon as the water reaches 40 degrees I will start adding some to the pond. As far as additional salt goes, I think I will wait to increase that since I am afraid it will further lower the water temperature in the pond. It may stress them more and do more harm then good.

In regards to treating the red streaks with Melafix and Pimafix, I don't think I can add that to my pond any longer. I added it last year and my Koi had a severe reaction to it. I had Koi jumping all over the place rubbing agains objects, etc. I immediately had to do a water change to get rid of the stuff. It scared me half to death. Especially when I have such a high volume of water to remove...I could not get the water out fast enough. Almost had a stroke! :o

I will take your advice and do the partial water change. Thursday is supposed to be in the mid 60's here in Connecticut and I plan on taking the day off from work to care for my babies. I will do a 20% water change and slowly had water back in from the hose and let it spray across the pond rather then let the water poor directly into the pond. I will add dechlorinator and ammonia remover, then start a pump with UV to circulate the water as you suggested. I won't start the filter and waterfall just yet, just a pump with hose to get the water moving towards the skimmer box to let the matt in the skimmer box catch the big stuff floating in the water.

You are lucky that your fish are already feeding...I am jealous! I don't think I will be able to start any feeding for at least another week or so. I think the water temp flucutates too much and I don't trust the pond temp to stay above 45.

Hopefully, with the water change and UV going, the fish will feel a bit better and I can get them through the next couple of weeks to feeding time. Can't wait.

Thank you so much for the advice, I really do appreciate it. I also love all the good stuff that everyone posts on your forum...the wealth of information is invaluable to us backyard pond keepers!

Take Care!

Robyn - March 7, 2012 12:06 AM (GMT)
Salt will not change the water's temperature. It will lower the freezing point of the water though. This is a good thing in the winter. In bad winters, I sprinkle salt on the ice on the falls to help it melt.

The MelaFix and PimaFix will cause foaming which can lower oxygen exchange at the water's surface if there is not enough aeration. If the pond's water was already low in oxygen, a dose may have been enough to stress the fish. Otherwise, it's pretty harmless to the fish. I'm using some now in my pond as a few fish have what looks to be physical damage. I'm not sure how they got it though. I usually don't use full doses either.

Have you tested the ammonia level? If it's zero, there's no need to add ammonia remover.

Temperatures dropped here today but I cleaned out my 50 gallon tub pond anyway. It look three hours. The water was just above freezing (was frozen in the morning), and the air was in the 40's! Most years, there's not much alive in there this time of the year but, since the pond never froze up this year, this little pond had a high population of green frog tadpoles, three species of snails, hornwort, and some lovely leeches. I had to clean it now as there are about 14 masses of wood frog eggs that are falling apart and will hatch in a few days. Once those eggs hatch, I can forget cleaning those ponds as I am not hand picking out a billion minute tadpoles. The 100 green frog tadpoles from last year were hard enough today. Countless ones probably died too but I can only root through so much slop.

moran439 - March 7, 2012 01:16 AM (GMT)
Robyn, I tested for ammonia with the master liquid test kit. The reading is zero but I think I will pick up a new test kit tomorrow since this one is a year old already. I am not so sure now that it is accurate.

When I used the Melafix last spring the pond was well aerated. As soon as I added the stuff to the pond, the Koi went crazy. The other stuff that seems to bother them is the clay. I added some of that to my pond last year too...I heard it has a lot of benefits but my Koi did not seem to like that either...they started flashing immediatley. Very strange...they are very sensitive to anything I add to the water. I don't use much other than prazi, Koizyme and salt in the spring. I am not crazy about chemicals. I am afraid to kill my fish

Can't wait to do my water change on Thursday. It will be warming up nicely and the fish will appreciate it I'm sure. Sometimes I wish the pond was will be an all day affair. Once I vacuum out the leaves and silt it will take most of the day to refill but I am ready for it!

Boy, your ponds must keep you busy in the spring. You have certainly is a labor of love. Everyone I know thinks I am crazy taking care of such a large pond. It is so nice to have someone to relate to on the subject of Koi and ponds and everything that can go wrong with them.

Have a great night!

Robyn - March 7, 2012 05:52 PM (GMT)
That's strange. I have used MelaFix and use the koi clay regularly. I use less than recommended in most cases. I am afraid of using the stronger chemicals. I bought some Prazi last year when some of my fish were dying but, after reading more on it (and finding out I'd need many more bottles), I was afraid it would harm or kill various animals.

Small ponds can still take all day to maintain. It took me 3 hours yesterday just to clean my 50 gallon tub pond. It will take 6 or 7 hours to do the 153 gallon pond. If I ever could do my 1800 gallon pond, it would thus take 100 hours straight - um, not going to happen! I have to spot clean it and do partial water changes but never 100%. My big pond has gravel on the bottom too so it's really impossible to use the pond vacuum on it. I can't vacuum up 400 pounds of rock! I guess your pond is just the liner? That must be "nice" to clean! As there are pros (as well as cons) with the gravel, I don't have plans to try to remove it.

moran439 - March 8, 2012 09:20 PM (GMT)
Hi Robyn,
I do not have just straight liner in my pond, I have gravel on the bottom and wish each and every day that I never added it to the pond. It does make it extremely difficult to clean and my poor fish are always sick!

I just did a 10% water change yesterday and tried to vacuum as much of the leaves and debris as I could. The water is very green and I could not see the bottom so I was a bit hesitant to go crazy. In a couple of weeks I will do a better cleanout but for now I thought it would be beneficial to get as much mulm and leaves out as I could since the fish were sick. It has already made a are now moving about the pond and eating algae off of the sides. Redness on a few of the koi has now turned to pink. I did not see any frayed fins or ulcers. I did see a couple though with white spots on their nose and top of head. Fungus??

I have not started the filter yet, but I had my husband set up a pump with UV to at least start the water circulating around the pond. It is really windy here today and the leaves blowing into the pond are being suck into the skimmer box which is what I was hoping for. I will leave the UV running until I start up and seed the filter(next weekend). I have not treated the pond yet since I was told that meds don't work if you have an algae bloom.

My Japanese Koi was jumping this afternoon and I suspect that she has flukes. Last summer I caught her shaking her head violently back and forth. I was shocked at the sight...I didn't know Koi could do that. I hope she can hold on until I can get the pond treated with Prazi. Prazi has worked extremely well for me. I really feel bad for her...she seems miserable.

The temps will be fluctuating for the next several days but next week I think it will be maintaining mid to high 40's and 50's. I plan on leaving the UV and pump running though to continue circulating the water. I suspect that it might stress out the fish with water temps fluctuating but I think the fish will benefit from the circulating water even if the water is still cold...what do you think?

I really have to hand it to you to take care of so many ponds and their inhabitants. You must do a complete and through cleaning since it takes you all day to do your clean outs. It takes me a half day to vacuum and the remaining time is spent refilling the pond. It takes everything I have to accomplish that one task for my one pond and the stress of sick fish really takes a toll on me. I go through so many sleepless nights in the winter and spring. Worry, Worry and more Worry! :-)

I just don't know how you do it! :-)

Robyn - March 9, 2012 12:15 AM (GMT)
Which kind of pond vacuum do you use? Since we both have gravel, if I use my power vacuum, it sucks up all the rocks and just jams with debris. If I use a gravity-fed vacuum, it doesn't such anything.

Were the white spots fuzzy? Fuzzy would be fungus. I have a goldfish with whitish areas like she had some flesh rubbed off. It's like spawning damage but they haven't started that yet. Anyway, small injuries may look white even if not infected. Just a dot of white could be a tiny injury or something like a cyst.

It's horribly windy here today too but 70 degrees F so I fed the fish twice.

I definitely think the circulating water will improve the water quality and fish health. As I mentioned, I leave my main pump to filter to waterfall going all winter. Your pond is even larger so temperature fluctuattions will be less than in smaller ponds.

I don't know how I do it either! It takes so long to clean my 50 gallon tub pond and 153 gallon brick pond because I have to hand sift through everything that comes out of the pond and hand pick out hundreds of tadpoles, frog eggs, snails (but don't try to save all the snail eggs!), insect larvae, fish, plants, and so on. Yep, I even hand pick up mayfly larvae and crane fly larvae from the 153 gallon pond each spring. If I didn't care if they all died, I could just throw it all out and start the pond over but I'm cleaning it in the first place to improve the situation for those very animals. Even though I'm careful, a lot of animals don't survive the cleaning. My big pond is so much bigger, I couldn't clean it without killing thousands of animals. Even a vacuuming will result in mass murder.

It sure helps being unemployed now though! Today, I got to clean out my 20 gallon tub pond (no animals in there, whew!) and repot my lotus. I had so many tubers that I decided to plant most of them in a 12 gallon pot I used to use for lotus. If I were working, I would have just tossed the $500 worth of lotus tubers over the hill.

Rosiemeadow - March 9, 2012 02:02 AM (GMT)
I spent all day cleaning my big pond today. I found one pretty good size dead fish :( I started the bio filter & waterfall again, fed the fish & the Koi were chasing, I guess it's that time again :wub: I dumped half of the pond water & refilled but the water is still green, sure sign of spring. The fish all looked very happy! :D Next...On to the little pond, I found another dead baby in there the other day :(

Broxandval - March 9, 2012 11:12 AM (GMT)
Hi Guys
I dont know what this fixation of switching of UV-C' and pumps is about but we go through our winter with Pumps and filters UV-C etc working fully.
Weve been down to -10c with no problem or breaking of UV-C.
Dead leaves we take out prior to the start of winter then cover the pond with Polycarbonate non of us has had the slightest bit of problems with grean water or water that is stressing your koi out ({ the red veins).
What are your readings Ammonia PH Nitrite and nitrate ?
A partial water change will help but you really need to get everything done and remember in future look to protecting your fish from Autumn through to spring buy reguala maintenance and small water changes exactly as we do.
You'll find that water trickled into the pond via a dechlorinator doesnt effect the temperature of your water filters cleaned prior to winter help immencely and UV-C's protected and left on stop grean water
Our koi have come through the winter at their best and dont look as though they havent eaten in the last two months, careful monitoring of temperature both pond and air helps ( our ovrall average temperature this winter has been 9c).
All has been correctly done to our koi throughout the winter as per normal....
broxandval Fishiedude Flowersmile

moran439 - March 9, 2012 07:08 PM (GMT)
Hi broxandval,
I guess we can thank the internet for the fixation. :-) Depending on which website you go to, there is so much contradiction that you are left totally confused. Just the other day, I was told that it is way too early to start my UV and that it would do nothing for green water. Water temp was 36 degrees.

Here in Connecticut, I don't trust leaving my filter, UV and waterfall running. Aside from the mild winter we had this year, it usually goes down into the teens for most of January and February. I am afraid to leave anything running for that long a period of time. I do a full cleaning of the pond in the fall and add fall/winter bacteria, and the water is presteen at the end of December, but come March with all the leaves blowing in over winter, it quickly goes south. Especally when the weather starts warming up around here.

I think it would be hard to cover my pond which is roughly 18 feet by 20 feet. Sides are about 2.5 feet deep and middle is just a bit over 3 feet deep. For Koi I know it should be deeper. If I were able to remove rocks I could get maybe close to 4 feet deep since most of the rocks that were on sides slid to the middle when we removed all the big bolders last year. Anyway, we just let it ice over and keep an aerator running til March.

In regards to the cover you have, how did you construct that polycarbonate cover? How do you shelter your waterfall from the winter winds? We have a NNW wind that blows across the pond all winter and we sometimes get some pretty high winds to boot!

How do you do your water changes in the winter? Do you pump out some of the water than let the hose trickle water back in? Or does it evaporate. Since my filter is not running in the winter, I don't think my water would mix very well and I would be especially concerned that the dechlorinator is not mixing with water. Also, since the filters are running, don't your Koi have to fight the constant current that they experience from the water circulating? All considering, I did not loose any of my Koi over the winter, but they do stress out from the water conditions.

I checked parameters this morning and PH is 7.6, ammonia reads zero as well as nitrates and nitrites. I still have a few Koi flashing though.

Robyn, the pond vac that I use is the Oase Pondovac 3. It took me a while to figure out how to use it but now that I have the hang of it, it works quite well for me. Without it, I could not clean the rocks out. I also use the microbe lift products for gravel bottom ponds and the pond looks pretty good all summer. Water sparkles and rocks look clean.

In regards to your inhabitants, I am amazed that you are able to differentiate between species...I could not tell you what's what in my pond other than frogs, Comets and Koi. :) I do find that amazing about you.

Robyn - March 10, 2012 12:47 AM (GMT)
I tell people to turn off their waterfalls in Zone 6 or lower in the US. The lines can freeze. The waterfall can build up enough ice to divert flow out of the pond. I'm in Zone 6/7 and during a few tough winters, the ice build up almost caused the pond to pump out over the ice and/or over the sides of the falls. It came close but didn't happen. I keep a de-icer at the head of the falls in the biofilter and put a storage tub lid over that to keep the wind off of it.

I believe that Dave's set up is unique in that it is very controlled and insulated. He has insulated sides, top, piping, etc. Correct me if I'm wrong Dave but I think you turn down the flow rate in the winter, do water changes in to the filter system, and keep everything well insulated? It's not possible for all of us to have such a nice system as that.

I have a Pondovac as well. How do you keep yours from sucking up the gravel? Do you use a certain attachment? Perhaps your gravel is larger than mine? If I use an attachment, it clogs too easily and/or doesn't suck enough. So, I just use the regular hard tube end.

Rosiemeadow - March 10, 2012 02:25 AM (GMT)

I left my pump running all winter with no problems, but turned off the waterfall pump. I also had a deicer in there, but only needed it a few times, since our winter here in SE Pa. was so mild :) This was the first large fish casualty I've had, other than a few years ago when I lost two of my beauties to that NASTY HERON!! I am not sure what happened, but when I moved a piece of "bubble wrap" that I had covering one of their home made milk crate caves,( they had three to hide in) that is where I found the dead fish, it was just under the top.
I am having a problem finding one of my Sarassa comets, is it possible for them to change their color pattern? The other one looks exactly the same, the only other thing is maybe that nasty Heron got it. :angry:

moran439 - March 10, 2012 03:12 PM (GMT)
I wish I could afford to do what Dave has done to his pond...I would love nothing more than to keep the pond circulating in the winter and it certainly would save me a lot of headaches come spring time. Dave do you have pictures of that setup?

The pump and UV have been running since Friday now and the water is clearing up nicely. It was cold last night and will be again tonight, but starting tomorrow the temperatures are on the rise. It will be in the 60's all week next week and I should start feeding my fish for the first time since last November...can't wait!

Robyn, I do have an attachment that I use when vacuuming the pond. The piece has a flat head with an adjustment on the end that you can slide back and forth for the opening. I keep the opening to the smallest setting. It still tries to suck up some of the smaller gravel but all in all in works beautifully. It works excellent on the liner, and I use the crevice tool to get the dirt that settles on the side of the pond.

Rosie, so sorry to hear that you lost fish...I lost a couple two years ago and was heartbroken...If I am going to loose fish, I usually see casualties in mid February. At that time the water is still so cold that there is not much you can do to save the poor things. Two years ago I almost lost one of my favorites but I was fortunate enough to have a garden center that houses Koi loan me a 300 gallon tank that we set up downstairs in the basement. It was for my white Koi Angel...I never thought we would be able to save that fish...she was pretty bad. We warmed her up and added salt and I fed her Medi Koi. By mid March she was back in the pond with her buddies and has been fine since. She looks good this year too.

We also had a Blue Heron visit our pond a couple of years ago as well. He was not successful in getting any of my fish but he tried really hard. They are pretty smart birds. I was home one of the days that he came to visit. I never saw one before...they are beautiful birds but I don't want one near my pond! My dogs did not even discourage him from coming around. I let them chase him, through rocks at him and it did not faze him a bit. When he flew off, he came back from a different direction and tried to sneak back in. This was early July we went on vacation and my stepson called to say he had found this huge birds foot in the backyard...wondered what it was...I wonder too if maybe it was the heron's foot and that maybe he was caught by another predator! Not my dogs though since they are all Papillons and would have quite a tough time catching a bird that size. :P We haven't seen one since. Hope we don't again. Nasty bird!

Robyn, one more thing...the white stuff I was telling you about, l saw on the Koi last year as well, the stuff looks like a thin film of's not bumpy looking...looks more like someone poored wax on the fish. The dorsil fins and tails are stiff looking. It did not clear up last year until the end of April and only after I had feed them 6lbs of Medi-Koi. It was very hard to get rid of. I did not have my UV running last spring but plan on leaving it running this year...maybe that will help. I notice it more on the black Koi. Do you think it's viral or bacterial. I think if it were carp pox it would be bumpy.

Broxandval - March 11, 2012 10:29 AM (GMT)
Hi Robyn moran439
In annswer to your question Robyn no we do not slow down the flow of water through the bottom drain the only thing that we turn down at all is the Spindrifter bottomdrain cover.
We have been down to -10c with no breakages the average temperature is 9c yes the sides and everything are insulated but it gets the koi through the winter in relative comfort , weve even found that if we add a small oil Heated 800watt radiator after a week we can slowly start to bring up the temperature of the water with the filterhousing being kept warm rather than the water.
The Polycarbonate sheets protect against frost snow and ice.
We are way down in the lower celcius the entire winter which much match with some of your American winter temperatures.
Moran if you ever remake a pond do it the insulated way you'd have none of the problems you get .
A bottom drain would mean you dont need to vacuum the pond just clean a vortex once a week (quick and easy) then trckle some water back in through a dechlorination unit, yes its going against the formal pond that you guys like so much but you could quite easily incorprate that into the design.
Dont go crazy feeding you fish to start with Moran just a handful every other day for now watch your water for any ammonia or Nitrite spikes do a weekly 20% waterchange and you shouldnt have much of a problem.
Personally on my pond I change about 30% of the water weekly it is very easy because I use a votrtex filter unit that seperates the big bits of detritus out you flush it clear twice after allowing it to fill back up , this equates to the 30% waterchange
The wax lumps sound like they are koi or fish pox dont worry about this as it is temperature related and should start to disapear as the water gains temperature moving towards the summer so there is absolutelyno need to treat with anything.
As to dep[t of pond ours is 4ft to 5ft is the depth recmended for koi.
One thing you dont know sabout Val and I is though we have 25 this years is our 26th year of koi keeping and this is only our second winter outside so our koi have come down from a stable indoor temperature of 22c and survived last years winter of -10c here in the UK as they have done on a milder winter this year.
Here is a link into our pond build:-

broxandval Fishiedude Flowersmile

Robyn - March 11, 2012 05:49 PM (GMT)
Yes, goldfish can change color but I doubt it would be that quick. Although I have seen a black goldfish go to have orange in about a week. Sarassa comets, being red and white, are normally colored up by the time that they are sold but some color shifting can occur.

The white film might have been columnaris or another bacterial infection. That's what I think my fish had last spring. It made them have a white film and lethargic. I used full strength MelaFix as well as salt and KoiZyme for a month before the deaths stopped. Koi or carp pox would be spotty and not 100% all over. It's not treatable but also very rarely fatal. As Dave says, it usually clears up on its own.

Rosiemeadow - March 12, 2012 01:06 AM (GMT)
Thanks Robyn, I think either the Heron got my Sarassa or it might be dead under the crate cave. I will try & get out there again Tues. to clean that one out Then I will see. My fish look to be all there, but with so many of them in this pond it is hard to keep track of them, guess it's time for another one! :D

Moran, my pond is only 18" deep & I have two Koi in there & they are thriving well!

Broxandval - March 14, 2012 07:07 PM (GMT)
QUOTE (Robyn @ Mar 11 2012, 05:49 PM)
Yes, goldfish can change color but I doubt it would be that quick.  Although I have seen a black goldfish go to have orange in about a week.  Sarassa comets, being red and white, are normally colored up by the time that they are sold but some color shifting can occur.

The white film might have been columnaris or another bacterial infection.  That's what I think my fish had last spring.  It made them have a white film and lethargic.  I used full strength MelaFix as well as salt and KoiZyme for a month before the deaths stopped.  Koi or carp pox would be spotty and not 100% all over.  It's not treatable but also very rarely fatal.  As Dave says, it usually clears up on its own.

The diagnoses is in your description a wax like growth is koi pox would you describe it as a white velvet type coating ? would you describe the white as a white haze around the head and shoulder region if this is the case your koi has costia.
It is imperitive that you treat your koi rapidly as to rid your koi of this growth.
I would suggest a formalin Malachite green attack to rid your koi of it thats if your ponds temperature is 11c or above.
If it is costia can be destroyed but bellow 11c your best bet would be Salt ( do not use Malachite or formalin as it can become toxic if your PH is 8.0 or above).
I dont know your ponds capasity you'd have to work out the concentration but add between 7-14g per 4.5 litres.
I doubt its columnaris but we would need a scrape to be sure as treating columnaris can be treating one of many other problems that come with it such as mouth rot, gill rot, fin rot or skin columnaris treating the pond is part and parcel of this treatment.
Best of luck with this
broxandval Fishiedude Flowersmile

moran439 - March 31, 2012 06:27 PM (GMT)
Hi All,
Sorry I haven't been on the message board to respond. I tried several times Robyn but I think you were experiencing some trouble with your website. It would not let me post...then we got busy around here and I have not had a chance to come back to the board.

Broxandval, the white stuff I was describing was a thin white film covering the head and shoulders of my Koi and part of their backs. They had this same problem last year and a lot worse, it also covered tails and was very thick. I didn't loose any fish though.

Anyhow, I have done two water changes since I last posted here and also vacuumed bottom of pond and added beneficial bacteria, 3 treatments of koizyme and started UV clarifier. Fish look great now. Thin film is gone and fish looking healthy. Water temp is now about 50 degrees and I am feeding once a day. Unless I did a scrap...I have no idea what that film is that keeps coming every spring. It is hard to describe. Fish flashed but not much really. No one is flashing right now. I will keep my UV running to minimize bacteria outbreaks and keep adding my KoiZyme.

Rosiemeadow, I hope you have stopped loosing fish! I know what that's like...I lost several over the last 6 years of owning this pond and it is a terrible feeling when they start getting sick and you have no means of saving them. This year I was pretty lucky. No casualties with Koi but I did loose a couple of Comets though.

I want to thank everyone for responding to my emails and the support that was given while I was trying to figure out what I should do. You guys are the best...the wealth of information that you all posses is invaluable to all us backyard pond keepers. It gives me comfort to know that I can always count on someone at this message board to offer advice and give suggestions. Thanks again for your support!

When I have a chance, I will post pictures of my pond and Koi. I may need help though in posting those pics! :)

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