Sluder 4, I know this isn't your thread, but your tank is MAJORLY overstocked. First off, you have goldfish, which are cold water fish, in with warm water fish! Cold water fish cannot live with warm water fish. Three goldfish need anywhere from 60 to over 100 gallons of water, depending on the species. Also, you have two angelfish. Angelfish need 40 gallons of water and a tall tank. Your tank is only 20 gallons. You cannot house so many fish together, especially when they are incompatible species. I suggest you start your own thread and get rid off all your goldfish and angelfish!