So my idea is to build an aquaponics system mostly out of cob. The fish tanks and the grow beds, maybe even a sump tank if I want one. My question to you guys is, "Will the cob be strong enough to hold all that water?" I'm thinking 16 foot diameter tanks holding about 30 inches of water. That's 3760 gallons of water. Will a circular tank with 1 foot thick walls be sufficient? I will line the inside of the tanks with dura skrim, fish safe super tough plastic sheeting. Thinking of attaching the ends to a board of wood and then burying it in the top of the tank wall. The grow beds will be similarly made, with longer trough like beds for flood and drain. It will be a very humid environment but open to the air. In south Mississippi it's always humid anyway. I would make the foundation very well drained and on a hill top to facilitate the run off to the beds using gravity. I don't see any glaring holes in the idea, do any of you guys?
