So i've had three common goldfish for a long time,Then I got a new black moor.He looked like he had Ich, but I treated it and I don't think thats the problem now.I had a ph and ammonia problem because I ran out of test strips,But I bought more and some ph correcting tablets.My other fish are fine but my black moor(Arnold)Is acting sick.Yesterday he was floating in the corner at the top of the tank.Last night he got stuck on the filter twice so I thought he was dead.But when I unplugged the filter he floated off.Now he is just sorta sitting at the bottom.Anything like a current causes him to float off like he has no strength to swim.I don't know whats wrong?? I put in some all in one lifegaurd treatment but I don't know.Should I put him in a hospital tank all alone so he can rest?Please help!:help: