Circulating the water is also what gets DO in the pond water. The bubbles from bottom diffuser aeration only adds a small amount of DO. It is the water movement caused by the bubbles, moving the bottom water up to the top, where the air interfaces with the water that aerates the water.
Bottom diffuser aeration is really just a different way of pumping water. Water movement by the bubbles is the key, not the presence of the bubbles themselves.
Pumping air down to the bottom of the pond and letting the bubbles do the work of moving the water just happens to be an energy efficient way of moving water upwards.
Last edited by snrub; 07/11/15 03:47 PM.
