Go to the store right now and go but some ick tablets and aquarium salt. Ick is this white dots that are on the fish. I had that on my fish and it almost killed them but I put the whole ick tablet inside the tank and I added some aquarium tank and out of my 10 infected fish only 2 died which is way better than all. Ick is a parasite that kills the fish it starts off in their gills and it moves to the body but it is possible to kill.