Well guys here's the deal. My fuge is placed outside the house, so sometimes it gets some sunlight (not direct sunlight, but just light bouncing from house walls and asphalt) inside of it. So now all the glass and some sand areas are covered w/ algae. I don't care for it, I just don't want that stuff to affect my tank.
So you are saying that it's actually beneficial to let that algae grow in the fuge?