quoting Joey: I am getting the black poly will also be ok to run into the pond, whick I will put threw the holes in a few bricks to hold it down. I need a check valve which one I dont know yet, I need a diffuser or two which one I dont know yet.
Joey, most diffusers have an internal check valve. Find out before going thru the hassle. I would not run the poly thru the brick holes, or ty-wrap bricks to it. If you use bricks, secure it very well or the compressor vibration will cause pin holes in the line. You may fill old pieces of garden hose with sand and ty-wrap to it instead. Or, slip pieces of rebar inside gardenhose and tie to the poly. For your distance, weighted hose is not too expensive.
