Ok. so the thread basically says it all. The fins on my mandarin seem to be slowly disinigrating. It's not as if something was picking on them. They're slowly becoming less and less of his fins. There's also a white msuhy string where the latest fin parts have come off. I nkow this might be hard to tell without pics and i'll try to get some. But is this fin rot or is there something else taking him out? What should i do?