Ok so I have a 40 gallon cube with a pair of clown fish 1 fire fish 1 royal gramma and a diamond watchmen goby plus corals and inverts. I noticed my male clownfish (smaller of the two) has what I though was velvet it looks like powdered sugar was lightly thrown on him. Besides this him or any other fish are not showing any other signs and still have appetites. It looks like velvet but the other symptoms do not match. Also please tell me all my treatment options out of the box thinking included thank you