[Hop]

Just so everyone is aware, this is not the plumbing that will be in the tank. It's similar, but I had to order some specialty PVC fittings so that everything will sit very close to the back wall. When completed the PVC will all be painted black also.







So onto the closed loop. As I think I mentioned, the closed loop structures I initially built, wouldnt cut it in my eyes. Here are two pics of the original ideas:




So I elected on these. They each have 22 1/4" holes, plus 2 1/2" loklines to keep the flow going and crud from settling under or behind the rocks: