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 Cory Whisker Problems
Posted: Dec 15 2011, 04:29 PM


Group: Full Members
Posts: 1
Member No.: 5,872
Joined: 15-December 11

I have 4 new corys and their whiskers seem bloody and are wearing away. The substrate appears fairly smooth. ideas?
Posted: Dec 15 2011, 08:14 PM


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

Welcome to the forum!

Whisker degradation is pretty common in corydoras catfish. My older cories often lose their whiskers but I don't normally notice any redness or damage. The whiskers just disappear. It is said that this happens when your aquarium is filthy but my tanks are about as clean as you'll find with weekly 50% water changes and vacuumings without fail. So, I'm not sure truly what the cause is. If you're seeing actual bloody barbels, then I would worry more about other problems such as poor water quality, high ammonia, high bacterial loads (usually goes with dirtier tanks), or infections. If you're not already doing weekly 50% water changes, I would suggest those. Check your tank's pH and ammonia levels. Cories love water changes, so much so that my panda cories have filled their tank with progeny. Is this a new tank or established?

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

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