Mjntrainer
Aquarium Advice Newbie
I have a 70 gallon tank started 5 weeks ago. It has a 100 gallon filter, live plants, airstones, and at the moment has 3 fancy guppies, 2 dalmation mollies (a male and a female who seem very sick), 5 platys, 3 glass catfish, 1 cory catfish, 5 neon tetras, 5 glofish, and 4 glass tetras. The glofish were first, then the guppies, then the platys, then the mollies, then the cory, then the glass fish. About 2 weeks ago, the fish started dying. The guppies were being attacked by the mollies, and their fins would be shredded, and I would find a dead guppy who never acted sick. 3 guppies have died like this. Then one platy died- the same day I got him. Didn't seem sick, floated him for a while, and the others who came with him are still fine (except one with a chunk missing from her tail). Today I found another dead guppy and a dead female molly. My remaining male and female mollies are staying close to the bottom together in the same spot, barely swimming, and they are usually very active. The rest of the fish seem fine. I have been observing closely, and no one has any white spots, or red gills, no flashing, and no strange swimming patterns (exceot the sick mollies). We do a 15-20% water change and vacuum weekly. I have been testing daily since the first fish died, and the ammonia, nitrite, and nitrate have been 0 until this morning when nthe ammonia is still 0, but the nitrate and nitrite are very high. I have been treating with Melafin for the last 3 days just in case there is fin rot (though I highly suspect it is just aggressive behavior.) I use a bacteria supplement weekly, and EasyBalance weekly. I use water conditioner with the addition of new fish, and only add 3 at a time. The sick fish do not have cloudy eyes, or anything else visibly wrong. What can I do?