Hi,
I use an aquarium air pump. It works to about 20 degrees and then I switch to a bird bath heater...I have not had any problems and it got to around 10 degrees so far this year.
Michelle in WV
I use an aquarium air pump. It works to about 20 degrees and then I switch to a bird bath heater...I have not had any problems and it got to around 10 degrees so far this year.
Michelle in WV