Do you mean those bowls that are also used for horse grain? Usually Found in feed stores ?
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I live in Maine where -20 (or lower) is the norm in the height of winter, I have a large flock and have heated water successfully for many years. I use rubber bowls with a submersible heater (many are sold as bird bath heaters). Circulating the water is not necessary. I have found it to be the best solution as heating bases don't hold up or warm large amounts of water efficiently. I would steer away from the heating tape method.