sg71 > Consider that a 1200 ft 3/4 inch poly line (Lowes Silverline) would cost $168.00 so a chunk of that $500.00 budget is gone already. As far a a single diffuser and a pump it can be done for $500.00 but you still have tubing from the shoreline to the diffuser to add in yet.So if you have a need for electric service for other things other than just the aeration system that may be the route to go.The savings would be the poly line as I see it ($168)and the trenchng if the electric line will be above ground,Hope this helps, Ted
