Thank you everyone for your wonderful suggestions. I do a water change every 3 weeks and recently just did one. I cleaned all the rocks, plants, etc in the tank and do a test strip on the PH levels, etc every week. It could be I did not clean the gravel well enough and they did get a fungus. I am going to take them down to be looked at today from this tropical fish expert and maybe he can help. I did add more salt to the tank and now the fish are at least swimming around today and not at the bottom of the tank. My tank is not over populated. I have 2 black mollies, two white, 2 orange, one angelfish, 2 small bala sharks and a few bottom feeders.