For the quad diffuser or any diffuser to keep open water with that much ice thickness is testimony for how well aeration helps during ice cover. The diffuser at 20 ft deep not only adds some DO to the pond and spreads it long distances, it provides some open water. Open water results in clear ice when the diffuser is not operating. Open water and clear ice allows microscopic algae (phytoplankton) to photosynthesize and make DO. That amount of DO can equal or exceed the DO produced by the bubbling of the diffuser. If the winter aeration can maintain at lease 4ppm DO in all the pond the trout will survive well.

Last edited by Bill Cody; 12/29/17 01:44 PM.

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