Hello again! Iv'e been doing some reading on greenwater culturing in Joyce Wilkerson's book Clownfishes, I'm interested in trying to culture some greenwater. I see you can purchase food for algae on the net...but with all of the nitrate possibilities in our fishtanks we alread have...isn't there a way to get the food for the algae without having to spend money to get it. (as if this isnt costy enough already right? hehe ). Anyways, I wonder if any have read-about/tried to create your own brew to feed microalgae?