I would say this thermometer did the job. Seems well done. However, it heats up a bit where you want it. I had 78 and the thermometer read 80. I turned it off to correct the difference and everything has been fine ever since. I would recommend this heater but don't install and forget. Come by from time to time for the first few days to check the temperature. That's a bit more for a 5 gallon tank. I had to turn it sideways and place it on the bottom of the tank to get it to fit, but overall it's worth it.
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