3/4 HP Rotary Vane Aeration System - For Ponds Up To 4 Acres, 12' - 16' Deep, 2 acre 8 - 12' deep, or 1 acre 5 - 8' deep. No Diffusers included. 600' of 1/2" I.D.Quick Sink tubing included. Choose from SCEPMD1 diffuser, SCDM4 diffuser or other diffuser of your choice (not included.)