I have a convict cichlid, Ollie, and a jack dempsey cichlid, Elton, in a 60 gallon tank. The tank is heated to 82F and has 2 Fluval70 filters. Elton seems to have tiny bubbles on him, which float away when he swims by plants or whacks them off with his fins. Ollie on the other hand has tiny white spots on him that look like there are white grains of sand sitting on him. What is it?