edit7279,

Again, I am not a pro. FWIW I took a quick look at the links you provided. IMHO The $920 setup, 1/4 hp rotary vane pump, would be the way to go if I had to choose from just these. With that one you would still need to buy airline and provide a shelter for the pump. The others are all simple diaphragm pumps which might be ok for winter aeration to just keep a hole in the ice, but they look more like koi/garden pond setups to me.

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