The 3/4hp pump will easily operate all 8 diffusers. Daily run time is actually based on the amount of biochemical oxygen demand of each pond. Pond BOD is fairly closely related to water clarity (visibility-transparency) and amount of bacteria-phytoplankton-detritus present in the water which consume DO esp at night. Pond age also has an influence on BOD; older usually requiring more daily BOD. The only way to really know this is my measuring the DO in the deepest water several times throughout the 24 hr after aeration stops.
For what I know about our ponds, your location / climate, and pond age, IMO good aeration for 4-8 hrs per day should be very adequate when using the 3/4hp compressor if you do not have dense algae blooms.
Last edited by Bill Cody; 03/29/18 02:06 PM.
