This is my first time, dealing with what I think is internal parasites in my fish. Over the past year, I have lost 4 fish with what seems to be some kind of parasite. I first notice that the ones infected seem to get very thin, though they keep eating regularly, and eventually after about 2 months, they pass. I first thought it may be due to old age, but now I know something isnt right since the one that died today had a hole in its stomach. (He was alone in the sump, so I know nothing was eating at him). Any suggestions? Nothing new has been added to the tank recently. Thanks in advance.
