I have a 20 gal and 55 gal. Last night I noticed these little hairs floating around, and when I looked closer I saw they were crawling up the sides of both tanks and were all throughout the rocks. When I get home from work I'm going to take a water sample and have it lokked at, but while I'm here, I was wondering if anyone knew what these were called? I've heard about it before, how these little worms lay eggs in the rock and then travel around the tank. Usually they come from another infected tank (my bf got some feeders from a store we've never been to before, other than that nothing has been introduced to my tanks in months). I'm really disgusted by these things, and any help or direction would be greatly appreciated. I've never had anything infect my tanks before. Thanks!!