Jersey,

I am also considering the siphon. But since the frost depth here is 36" it seems to me I would have to bury the upper horizontal run of the siphon at least that deep or risk ice plugging. Still might be an option.

I'd like to find someone up north who has one installed.

Regarding the aerated pond temps: My understanding is that the DEP would prefer for the pond to stratify so colder bottom water could be discharged. Is it possible to aerate the upper two thirds of a pond while leaving the colder lower layer undisturbed? Maybe I should start a new thread in "Should I Aerate?"