Hi all! I’m new to this group. I’ve been keeping freshwater fish and dwarf frogs for a year now so I’ve still got a lot to learn. I’ve had this dwarf gourami since June. His fin started to deteriorate prob 4-6 weeks ago. I took out one of the decorations that i thought may have been the culprit. Very recently, the past few days, we’ve noticed that his color is lighter, his fin is much worse, has some brown discoloration here and there and his face is really starting to deteriorate pretty bad. I’ve been doing a lot of research and thinking this is bacterial in nature. I bought everything to put together a hospital tank but am thinking since he’s exposed my catfish and endlers, i should treat the entire community. I’ve purchased erythromycin and i have found minimal articles about the safety of treating the other fish as well. Thoughts?