[Fish4brains]

Shane,
I think Sir_BlackhOle is right. I always get a light case of green water when I start a tank. A diatom filter or UV will get rid of it quickly, but if the conditions are not ideal it will return. After a few weeks or even a couple of months it always goes away and then the water is crystal clear.

Also I think freshwater clams could be a less expensive way- they filter feed, right? I would think they would filter out all the algae if you had enough for enough time.