from the picture you can see that the bank is steep where the brush is. Ted provides great advice for starting up an aerator when ice has formed over the entire pond. I also cut a hole as a vent above the diffuser to let air escape from under the ice. I have a float on my diffusers so I know where they are accurately below the ice. IMO 4.5" of good clear ice will easily hold you up while you cut brush unless you weigh as much as a lawn tractor.

Last edited by Bill Cody; 12/12/13 02:27 PM.

aka Pond Doctor & Dr. Perca Read Pond Boss Magazine -
America's Journal of Pond Management