I'm in desperate need of HELP. Had the tank running for 2 months now and just swapped the rock and the sand with the existing water last week. Since the weekend all four of my fishes are death (2 clowns, 1 blue tang and a Kole). Can you one please help me identify what is it on the fish? I don't think this fish will survive and unfortunately I do not have a hospital tank. What should i do? all the Fishes that are death had these symptom and currently 3 of the fishes in the tank are carrying this white stuffs on their body.
Please HELP me


