I bought a dwarf Lemonpeel angelfish two weeks ago and it was doing great. I noticed a few hours ago that it was laying on its side at the bottom of the tank. I thought it was dead but it's not. Now it's sitting at one end with its nose up in the air. It was having trouble swimming as well. Upon closer inspection it appears as if it has a small hole near its head. I was looking up saltwater fish diseases and think it may be hexamita (which I think is the same as Hole in the Head disease). It's belly also looked distended and it isn't eating. Do you all think this is the correct diagnosis and if so, I read you should treat the water with Metronidazole. I don't have a QT set up right now and am afraid by the time I do that the fish will have died. Please advise. BTW, all tests on the tank are in normal ranges. My other fish (two clowns, and one damsel) are doing fine. However, a week after I got the lemonpeel it seemed to be twitching a bit. I'm assuming there may be something like Lymphocystis going on as well.