I have a 125G freshwater tank with 8 clown fish, 2 Cory cats , 2 angelfish, 8 rummynose tetras, 3 platys, 1 gold gourami, and 4 glass catfish. I’ve had glass cats for several years and they’ve always hung tight together, however this group, I’ve had for over a year. What is strange to me is that one of them (the same one) hangs out by itself all the time, 24/7. I feel sad for it,wondering if he has been kicked out of the group, or if it is by choice. Anyone ever encounter this? I think if I get a few more, he may still hang by himself.