This thing is terrible! HE CANNOT DETERMINE THE TEMPERATURE OF YOUR TANK! Following the directions I put it in my turtle tank and it read 34 degrees Fahrenheit which was inaccurate but even in that cold it never turned on! it stayed at 34 degrees despite having a much better heater in the tank, and the thermometer read 76 degrees. And has never turned on USEFUL and will most likely kill someone's pet!
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