1 HP Rotary Vane Aeration System - For Ponds Up To 6 Acres, 12' - 16' Deep, 3 acres 8 - 12' deep, or 1 1/2 acres 5 - 8' deep. 800' of 1/2" I.D. Quick Sink tubing included. No Diffusers included. Choose from SCEPMD1 diffuser, SCDM4 diffuser or other diffuser of your choice (not included.)