A little algae is beneficial. I forgot why but I read it in a book somewhere, I'll go dig it up later.
It's a nasty little thing isn't it? Algae photosynthesizes in the day, but grows nocturnally, and it's really annoying. However, algae is algae....
Just a reminder to anyone who buys an algae eater to not get a common pleco.

Just go into the compatible fish forum to see why.