Ok so my male dwarf gourami that I mentioned in another post seems to be getting worse and I don't know why all the other fish in my tank seem fine and swim around alot but the male gourami just floats and sinks he seems to be laying on the bottom of the tank alot and every once and awhile he will swim up just to sink back down could there be a problem with his swim bladder if so what kind of medication can I get for him to help him out?