I think I am having a flatworm problem but I am not sure. I am inept at computers and otherwise would post a pic but for now I will try and describe them. I have a ton of little orangish brown little flat things. They are only about 5 mm long or less and kind of creep along slowly. They only come out when the lights are on and they cover everything rather quickly (sand, LR, glass but not corals thank god.) So I guess I am asking what they are, and how do I wage war on them without hurting corals?