I have both my clownfish, a blue tang, and green spotted puffer in a QT tank for a month now after i noticed ick on the blue tang. After 2-3 weeks, all seems healthy and eating well as normal. But recently, i noticed both of my clownfish eyes are swollen, not eating, lethargic, heavy breathing but no discoloration. My blue tang seems to have patches of discoloration, scratching but eating very well and active. Could this be velvet/Brooklynella or bacterial infection? What should i do? I am more worried on the clownfish as they are not eating.