The only thing I could see happening is that your pond might get a little colder towards the botton temporarily but I'll always take better quality water for my pond any time.
Any thoughts from the experts?
Yes, I am thinking that it would be colder water, but was wondering if it ever gets to the point that it would be to much. I remember something in past topics about "super cooling" from aeration during the winter. Thought this type of set-up might be a similar effect. Perhaps with a siphon sysyem you don't need to aerate during the winter, or at least not as much? I suppose there are to many variables to really have any answer to my question.