I have an "el natural" style aquarium. I've had a couple of fish die over the past few weeks. The tank is heavily planted so i don't suspect amonia problems. Recently I noticed my dwarf danio looks as if the fish scales all over his body are raised. He has a textured look :tape2: to him but he's been swimming around normally with no unusual behavior. Does anyone know what this is? What can I do to treat him?