I'm having more issues with my 36 gallon second hand tank!! It came to me overstocked and filthy, so I re-homed the majority of the fish and started 50% weekly water changes. I kept an angelfish and two gouramis and added in 2 guppies and a balloon molly after about a month. My water parameters are good now, nitrAtes 0, Nitrites: 0, pH 7.5, ammonia 0.
Unfortunately, I just lost both gouramis within a two week timespan from symptoms that looked like ammonia poisoning, even though the ammonia in my tank has been 0 since I got it. I suspect that the levels were pretty high before I took posession of the tank, and some of the fish I re-homed looked like they weren't in the best shape either. That leaves just the angelfish from the original inhabitants, and I noticed when I got him that he had red spots in his eye, but I was told that was ok, since he doesn't seem to have any other issues.
When I open the tank lid, he darts to the top and eats flakes, freeze-dried shrimp and bloodworms like crazy. I alternate between feeding those three things regularly, usually once a day in small quantities and I ocassionally give them shelled cooked peas. He has seemed pretty healthy up until this point.
I wasn't home the night before last, and when I came home from work last night, he suddenly was only breathing out of one gill, the other looked shut. On the gill he is breathing from, the inner part seems to hang down some, and it looked a little red inside, but they usually look that color. He does seem to be breathing harder, but just kinda floats around the tank with no real pattern. He's always an avid eater, and I haven't seen him eat anything in two days, so I'm very concerned that I might lose him, I can't take all this death lately!! Please help!
Also, I bought a 10gal to use as quarantine/hospital tank, and I'm in the process of fishless cycling it, but it's not ready, so I can't move him out right now:/