Oilhead: there was an article in one of the magazines you get free from the hydro stores within the last year about a desert island's restaurant where they raise Tilapia. The water is fed to their herb and veggie crops with nutes from the fish, (poop).
I tried to get to the link in you original post and couldn't but the second one got through. I suspect the rude character who told you to get fucked had the same problem just no manners. Thanks, the article was interesting. HSA