Hi, I'm new here, stumbled across this site while searching in Yahoo for ways to kill this bacteria in my tank. For a few days now, I've noticed a couple of small green-brownish, almost moldy spots on my tank, followed by what looks like really tiny worms all the way around my tank, they just stick on the sides of the tank, and never move. I guess they're worms though. I don't understand what kind of bacteria it is, or how it got there, but I don't like the looks of this. If anyone can identify this problem for me and tell me how I can treat it, or what kind of medicine I can buy for this, it would be most appreciated. Thanks!