What is exactly is meant by an aglae bllom. I have a 55 gallon FOWLR tank and started getting brown algae last week which has gotten progressively worse. I showed a picture of it to the guy at Tropic Isle in Framinghame (on my cell phone camera) and he confirmed that it was Diatom (something like that) Brown Algae and he said it was somewhat normal to get it. Any thoughts on how to get rid of it or what to do as it is now pretty brown or do I ride it out and it will clear up? HAve kept the tank light off today thinking maybe that will help alleviate some of the growth. Any thoughts?