I have power at the corner of my dam and am looking at running a 5 diffuser system. The longest run will be a double diffuser almost 500ft away. It will go down to a depth of 20ft before rising across a point to settle at 12-15ft deep. Would it be cost effective to run pvc for majority of the run? How is everyone running air that far from the pump?

God has blessed us with this day, what we do with it is up to us.