I have sent something simlar to this already some where. So this wont quit be the same as the first one . But anyway, thanks for answering so soon. Youre great, But you knew that already, huh. About me; I have a greenhouse 12' X 28' I tried growing plants in soil in boxes but didnt work too good. I wanted to try hydroponics. So I got on the computer to find out about it and ran across aquaponics. I liked the soundof it better than hydroponics. So I'm in the process of changing. I have tried the 3" pipe system, but not as good as I wanted it to be. So I have set up the barrel System, havent gotten it to working yet. As soon as i figure out how to work this computer on this web site I will send you a picture of me, and some of my system. But my question was How do you get rid of algee. I think it is bad on my plants as well as my fish. If you would be kind enough to tell me I would be ever SO thankful. thanks again.