What started out as a mishmosh of Tupperware containers, cardboard, and Duct tape is now a functioning system of pipes, drains, and plastic that turns a standard fish tank into a self-cleaning ...

As fish do, Bill Carlson's tilapia poop a lot. So do his catfish, goldfish and bluegill. For Carlson, this is a great thing. It means he's spoiled, regularly, with some of the freshest salads around, ...