I think you can operate the 5 disk membrane diffusers with the 0523. I'm operating 6 diffusers with that pump, although in deeper water (11-15ft). Depending on water clarity you may not need to provide full mixing to the diffuser in 4-5ft of water. I question if anoxic conditions occur in most ponds at the bottom zone 4-5ft deep especially if the area gets some wind action. Before I would place diffusers in 4-5 ft of water, I would verify that this area develops significant stratification and anaerobic conditions. Wind action normally mixes most ponds down to 6 ft deep. Exceptions are ponds are wooded areas with little wind action.
Last edited by Bill Cody; 05/24/16 10:57 AM.