Hopefully, Sprkplug, the resident HBG expert, or one of the other pros can answer that.

FWIW 6 feet only is scary for me. I am a fan of having a little winter aerator to pop a hole if the snow gets thick and keeps light from penetrating the ice. My winter aeration is set up to just flip a switch in the house if I start to get nervous so I can blow a hole thru the ice. I am further north than you and my pond was only 7 or 8 feet deep last year for winter (deepened to 12 to 14 this summer). I didn't loose any fish I am aware of last winter.

Last edited by Bill D.; 09/22/15 10:07 PM.

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