Pond Boss Forums AERATION Systems questions Pump not strong enough?

one easy way to check if the pump can operate 4 diffusers the same is to move all diffusers into 2 ft of water. Then watch and check the bubble flow. As the depth increases for the hiblow the CFM rapidly decreases. 1/2" airline for that far of distance may also reduce air volume from the diaphragm Hiblow. Matala diffusers have built in check valves. I would remove the accessory inline check valve which could restrict air flow.