Just a thought on the Intex pools. I have seen koi folks put center drains in them using a bulkhead fitting and elevating them with high density foam board. They were using them as quarantine tanks or to bring their fish in for the winter.
When I finally get my coldwater partial recir going I will elevate the pools with a low level plywood platform and a couple 4 X 4's on top of each other spaced apart under plywood to support the tank. Probably two 4x4's every couple of feet. Or one layer of cinder blocks. The plywood will have a cutout in the center to provide rigid support to the center drain. My side drains will be 4 inch PVC siphons and the pools will work like a Cornell dual drain but on a shoestring budget. Mechanical filtrstion will either be a sieve filter or a rotary drum filter. There's an affordable European RDF now on the market for large koi ponds that would be perfect for all my tanks. I believe it's called profidrum. There's couple of distributers in the US now on the Koiphen site. There was another imported one from Indonesia that had a lot of mechanical issues.
Check Amazon and Ebay for Intex pools. They usually have the best prices and the shipping may be free. I got a 12 foot a couple of years ago for $108.00 with free shipping.
Last edited by Cecil Baird1; 10/15/15 09:33 PM.
