FnC, to be honest I might have to go back and see the exact footage but I started with a Kasco system that has two air pumps and 6 diffusers along with some weighted air line, (I bought additional air line) It was a package but can't recall the package product Id but should be easily looked up under their product lines. I started with 1500' of 3" rolled tubing and then reducing it to 1.5" for 300' and was then connected to 200' of 1"pvc and 200' the last weighted line going to the last diffuser in the line setup. No manifold but pvc had 6 different T ball valves connections that regulate the air to each diffuser. Hope this helps. I can say there is plenty of air at the end point. This comes from memory and that is not the greatest these days
