Danio

Question
I got 3 danios (1 zebra, 1 leopard, 1 pearl..all longfin) and 1 blue dwarf Gourami in January and they are in a 10 gal. tank. About a week ago the Gourami had what seemed like a cold sore on the side of its mouth with a little white extension in the middle of it. I was told by a fish store owner to treat all the fish with IckAway to treat for fungus. However a few days later my Zebra danio developed what seems to be a red lump in her tailfin, and the Gourami still has a small bump where the sore was/is (the white extension is gone). Unfortunately I did wait about 2 days to do a 50% water change after medicating. I added Sea Chem Stability after changing the water and some Aquarium Salt when I medicated the tank. Is it possible that I waited too long to change the water and have now caused my fish further harm. Help!! I don't want to lose my babies!! Thank You.


Answer
Hi Brandi;

Unless it has been a long time since you changed any water I don't think that waiting did any harm. 50% is a lot at one time though. Try not to change more than 25% at a time. Fish do need a 25% water change every week to stay healthy so if you haven't been doing them, it would be good to start. I think they just need a different medication. If lesions look reddish it is probably a bacterial infection. Use a medication for bacterial infection and make daily water changes of 25% until they get better. Avoid changing more than 25% in one day because it can really shock your fish. Fresh clean water daily when they are sick will help boost their immune systems and give them a better chance to heal. The aquarium salt is good to use too. I hope they feel better soon...

At Your Service;
Chris Robbins