Actually, I pretty much agree with you. I just wish we had a way of maintaining a good balance without spending $$$.
I have researched greenwater and I think I'm going to look into it. I have also seen this
>>Plankton Reactor<< (halfway down the page on my link).
I translated word for word an email to the makers of the Zinn Plankton reactor but it would be too costly to import.
EDIT---Here's another link
>>Zinn Plankton Reactor<<