just_got_tanked
Member
The dots are black ich. You need to get the fish out and into a hospital tank. The black dots are worms that grow on the fish. They will fall off from the fish and hatch new eggs. You need to siphon out the tank. The young worms will develop on the tanks floor. I your tang scraping itself on the rocks or the substrate. This is a sign of the black ich. Besides the black dots on the fish.