Hey y'all! I've kept livebears for a few months now, and all of a sudden one of my male mollies has started acting really weird. He's kinda floating vertically, shimmering his tail, in a trance like state.. especially when on eof my male guppies is around him, then he'll snap out of it every now and again, but go back to the same.. he kinda sinks a bit to, then one of the other fish will nip at him.. HELP!