FWIW... if you have any desire to doll the outside of the ponds up... covering the faces with wonderboard (cement board for ceramic tile) and tiling it would add tremendous strength and be quite attractive IMO

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Anthony Calfo

Im going to try this as a flow through type system, but if it doesnt work i designed it so i could also use them independently. Im basically pumping all the sump water into the first section and having it overflow into the next two sections. The bulkheads in the last section will return water via an angled pipe back to the sump under the first section.The ammount of water pumped into the first section must be the same ammount that is exiting. Im going to use a return pump between 3000-5000 gph. it sounds like alot of water going over the spillway, but im not quite sure what kind of water movement it is going to create. im also going to connect some spray bars across the bottom of each section to the return pump so i can turn them on daily to blow debris on the bottom back into suspension.

It may look big, but its a relatively small ammount of water for the size. It totals roughly 750 gallons including the sump, but gives me almost 150 square feet of growing space.

Im renting a portion of a retail stores basement for this project. If u look at the pics you can see a few tanks of the first prop system i put down there.