DOES NOT WORK! I got a gallon tank and this heater has been plugged into various outlets and it does NOT work! This was an emergency pickup ! Now I have to wait til tmrw for stores to open to buy one that WILL work! AVOID ! AVOID! AVOID!

These work so well. My warmer went out in my 10. Gallon tank and I used this temporarily until I could get a new one and it kept the water perfect.

I use this heater for my 1 and 1.5 gallon tanks. They all heat the water differently so beware. I have three tanks all with the same heater but some are more hot than others.