Ok, another question about my girlfriend's fish (her comp's down and slow...). It's moderately OCD... First it would take 'rides' in the bubbles from the bubble stone, then go off of them and to the bottom, swim behind the stream and then back into it and ride it back to the top. It would do this for however long it was entertained by it. Then it'd go about it's swimming and normal fish activities. It did this for about a week or so. Now it's moved to going in an oval around it's thermometer (stuck to the side of the glass on the tank). It'll swim/ float under it and then swim up to the top, then back down, and then repeat the process. I watched today (off and on) and it did this for roughly a hr and a half before I got tired of watching. A small amount of history that may or may not be relevant to this question. He was a bit of a rescue fish and his tail fin was (and still is) pretty short and all, but he's getting better (using Melafix). Is this normal or what? Any suggestions?