I'm trying a 2 gal bucket with nipples that I made last summer, the nipples are at different heights as I wasn't sure where to put them that the birds would like. I'm using an aquarium heater suction cupped to the bottom of the pail and a submersible pump, i'll let you know how it goes during our upcoming cold snap, it is not suppose to get above zero on Sunday and Wednesday.
Tomorrow it is going to be very cold
