I think my tank has planaria. I'm not sure though. They are extremely thin like hair and tiny no longer then half a dime maybe... They look to be a pinkish red or maybe a pinkish white. Extremely tiny!!! I can't even get a pic. Sometimes it looks like my tank has five and other times it looks like 5,000. I change water don't over feed not to say that I haven't. I think maybe I have to many stones in there so maybe I'm not getting it all when I vacuum. Anyway does anyone have any clue what they are? If they are planaria or not and how you get rid of them? Are they going to harm my fish? Please help!!!