Hey guys, one of the five of my bloodfins started swimming in circles like he could only work one side of fins, and his tail was always "weighted down". I just went down to see if his spine was curved, but he has since stopped doing it? Any idea what the problem is? My water conditions are fine, although I did do a 30% water change this morning. The water wasn't temperature matched but it usually only drops my temp by a degree or two (which is what it did this time) and it's RO/DI water so I know the water is fine. I also trimmed the plants this morning, and vacuumed the gravel. Well actually I vacuumed the BGA up, since I have plants I don't usually vacuum the gravel that much. All of the rest of my fish are fine, and the tank's been set up for about a year now.