Hi! I have a well established 75 gal with undergravel and powerheads, fish are 3 3-4" silver dollars, 1 4" (body) angelfish, 1 9" striped raphael cat and about a dozen asst tetras.
A couple months ago a second raphael cat begain to lay around listlessly and unresponsivly (more than usual) on the bottom and later passed away. He did not have any visible body symptoms until death, then I noticed redness around the anus, which I addtributed to bloating.
The other cat as begun to act similar over the past couple weeks and now the angelfish is laying flat on the gravel, but he will move if disturbed. He is now showing some redness at the base of his fins. Tetras are all fine.
I have not added any new fish in a long time and they are all old, tetras are 2-5+ years, angel 4+ and the cat is 25+.
I have been "out" of fishkeeping for quite some time and would like some suggestions for current name-brand medications or combos that might help and still be safe for all the fish. Many thanks in advance :)