I change back and forth and since the heater has an automatic thermostat it only comes on when needed and also had an aerator freeze up in the 2010 winter since it was so bad and I did not have a heater back then
I used my pump and had to do this after that .
Siisy, i made something exactly like that last year after seeing your pictures. I will have to search my camera and computers, but i have some great pictures showing how well it didn't work for me
We had a couple of REALLY cold days with wind right in a row, and the ice formed up and over the entire little fountain contraption i made.
It was really cool looking, the ice was crystal clear, and you could see the little streams of water shooting out and into the water, but ice had formed up over top of the entire thing. I'd have to expiriment more with it to see if i could get it to work, but it was cold, and i had ice, so i just went out and bought a heater.