I have had my BioCube 29 established for about 6 weeks now; added 2 clowns about 3 weeks ago. They seem to be very healthy, active and eating well. I noticed a day ago that one of them has 3 small (1/32~1/16") round black spots on it's body, one by the tail and 2 behind the pectoral fin, all on the right side. The one by the tail developed frst, then the other 2. They were not there when I purchased the fish. The spots are clean looking, no flakeing, swelling or bumps. Any ideas? Thanks