I think one of my clownfish has velvet. I have noticed him the last 24 hours not eating and breathing very heavy. I also recently lost a flasher wrasse and a fire fish. What should my next step be? I still have 1 other clownfish that is moving around well and eating and same with the other fire fish. Do I have to basically restart? I don’t know what to do and I don’t have the room or anything for a Quarantine tank. Someone please tell me what they next step should be