Ya, I'm clueless. With only 15 fish in there, not many catfish dinners. You've got me thinking maybe some type of aquaponic flood system. I've got a nice budget for some raised beds, so if I can use a pump to flood some soilless beds they can filter the water/fertilize plants and aerate on the back end. More fish and easy gardening...right? Sounds doable, or ridiculous?