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 Salt In The Pond?, Should I salt my pond in the spring
Posted: Mar 21 2012, 08:13 PM


Group: Full Members
Posts: 1
Member No.: 5,896
Joined: 21-March 12

The local pond store has told me to add salt to my pond in the spring. Does anyone know why, how much, and what does it do. I have had this pond for 3 years, had very good luck with it so far. This spring I have a lot of green hairy algae. Should I fully clean out the pond even though it is a big one or will starting up my filter system with UV light help to get rid of it. Does the salt help with that also? wink.gif
Posted: Mar 22 2012, 11:27 AM


Group: Admin
Posts: 9,942
Member No.: 1
Joined: 1-September 03

Welcome to the forum!

See my salt page at for more information. I talk about why to use it, dosage, etc. on that page. I put a little salt in my pond in the spring but not the large doses that koi experts say to use. Some people say to only use it for treatment and not to have it in there all the time. I use it in the spring because that's when bacterial problems are at their worst, and salt deters bacteria and fungus.

The UV will only kill things that flow past it. It cannot kill string or attached algae in the pond itself. For more on algae and how to deal with it, see
In order for salt to kill algae, you would have to add so much that it would kill any plants that you have and start to harm the animals.

I do suggest at least a partial pond cleaning with some vacuuming or netting of the bottom and a water change. That will help as well as getting your filter going. Do you have live plants? If so, once they get growing, the hair algae will die back. That is already happening in my pond. A few weeks ago, I had hair algae all over my waterfall. Now, the water celery is having a growth spurt, and the algae is almost gone.

Good luck!

Robyn, Analytical Chemist, Zone 6/7, Maryland
Servant to 4 cats, 2 rabbits, 4 guinea pigs, 2 mice, 1 redbellied turtle, 3 freshwater aquariums (65, 50, & 20 gallons), 2 saltwater aquariums (6 and 12 gallon nano cube reefs), 7 outdoor ponds (1800, 153, 50, 30, 20, 20, & 12 gallons), 1 indoor pond (20 or 50 gallons, winter only), crickets, mealworms, and hundreds of fish (of about 18+ species), amphibians, snails, shrimp, corals, crabs, worms, and so on in those aquariums and ponds. A mostly full list of my current animals is at

fishie.gif ribbon.png
Posted: Mar 26 2012, 04:20 AM


Group: Senior Members
Posts: 4,443
Member No.: 4,124
Joined: 1-November 08

Hi robalana
Weve been keeping koi for 26 years this year and hardly ever use salt fresh water species do not live in sat water so why use it ?
Yes it was the first cure all and indeed weve used it when our koi have been ill before but you can run into problems by using it such as with Malachite green where if your Ph is 8 it can turn the water toxic against your fish.
This is a risk we are not willing to take, however stories of salt and zeolite i;e if you use zeolite with salt it is supposed to cause the zeolite to discharge all the ammonia it has leached out of the water turn out to be a total myth as the amount of salt you use when your fish are sick is not enough to cause this discharge from occuring it will take much more thn you would use in your pond for this to happen

broxandval. fishie.gif

Weve been Keeping Koi now for 26 year's we have 20 Koi, 1 orfe. We have a russian blue type cat with while leg markings white chin etc called Pepsi and the cutest young boy cat, Jet black in colour (who has two tails) called Jack.
A growing collection of fishy art and Badger/Otter/Dolphin/koi fine art prints.
Collection of Figurines/Plates/Cups/Slates/Clocks all of them are Badger/Otter/Cat/Dolphin
Collect Benaya koi tiles.
Large Library of Koi/Koi/Fish Health Books plus another Library of Tropical Fish/Fish Health Books.
Member of the Koi Magazines Koi Hall Of Fame.
Our deceased cat family:-
RIP Suki 2005-2013
RIP Dusty 1990- 2008 RIP Dillon 1997- 2010
RIP Sammy 1989-2007 RIP Baby 1991-2006
RIP SpookyII 1995-97 RIP Spooky 1990-95
Time Zone GMT

Vals birthday 19/3/59
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