its a 50watt aquatop summersible heater with a thermostat so if you have 2gal or 5 gal in the pail it will only get to your desired tempeture. $10 on amazon. iam getting a reading of 85 deg think im gonna keep it there
I keep mine at 90 degrees. By the time it gets misted to them it is a lot cooler. They have loved it ever since I added the heater. They dance right under it now. Before they were hesitant but ever since I heated it they love it. Don't worry about the heated water causing any bacteria unless you have a fish tank or no drainage.