http://www.google.com/discussions/vi ... =16&t=5864 looks like it could end up a death trap
If you restrict light and feeding if wont grow anything like that! I'm not sure what happened to that guys tank
Edit: That's macro algae and not hair algae, you pretty much get the same result if you leave it to do its own thing though lol.
Edit2: The hair algae got introduced into my tank by the snails I purchased, so be aware of that if you decide to buy some snails.