I have two male beta fish in a three gallon tank that is seperated by a grate. I have had them for several months and everything has been perfectly fine. I came in this morning to find one so swollen it looks like a puffer fish. He can't swim and is pretty much upside down laying on the bottom. His gills aren't moving and when he does try to swim he doesn't go very far. His fins are all frayed and his beautiful red color is completly faded (probably because he is so swollen). The other one lookds like his fins were nipped a little too and has a slightly swollen belly, but not his entire body like the other one. He won't eat and is laying on the bottom, however has all of his blue coloring. It almost appears that they had a brawl in the tank, but there is no way for this to have happened because they are seperated, unless they were nipping at each other through the grating. I am getting started with a water change, but I need some serious help quickly before they both die. Also on Friday when I left them, they were two very colorful very happy fish. What could have happened to them??? Has anyone see this happen before?