My fish are dieing at a rate of about one every week.
- 60 gallon freshwater
- About 40 inches of fish that are a mix of gouramis, mollys, guppies, roseline sharks, siamese suckers, angelfish and a couple others.
- ph of 7.4
- nitrate 10
- nitrite 0
- ammonia 0 to .75 ppm
(my tests read 0 but the fish store test showed about .75 ppm
, which is weird because they use the same liquid test kit I have and I've triple checked my test)
- I have been changing the water whenever the nitrate gets up to 30 ppm
The last 2 fish to die were the oldest residents of my 5 month old tank, both red-eyed tetras. They both lost scales in a big patch and had cotton-like growths. None of the previous victims had these growths or lost scales, they just looked emaciated one day and dead the next. The tetras lived for about a week with the growth.
I suspect I might be over-feeding them. I don't really know how much to give them, and if the fish store is correct, the ammonia is too high, right?
Another suspicion I have is that there's a virus or bacteria. I bought the tank used from a guy who let it sit for a long time with water and fish in it without doing anything to it. Even the filters were broken. You could barely see through the water. I thoroughly cleaned it and gave it new water obviously, but I reused the rock and gravel he had. Maybe something nasty spawned and is still there?
Thanks in advance for your help,