I just read the great post on different forms of algae, and how to get rid of it. But is it all so bad? Wherever there's algae, there's the lowest nitrate readings. I know it does seem to take control, but there's this tremendous benefit I've found, at least from hair algae (or thread, I'm not sure which): as you wind it out, you can be bonding with your fish, fussing with your tank, WITHOUT FEEDING THEM! As someone who feels compelled to feed every time they beg, this is a great alternative. And yes, my fish do come around and watch. Strange as it sounds, it's one of our nicest activities "together". 