MNG Posted July 21, 2021 Share Posted July 21, 2021 I have this heater, rated for up to 80 gallons, in a 65 gallon tank. The temperature in the tank was about 74.5 degrees F. Over a day ago I set the thermostat on the heater for about 83 degrees, in preparation for some fish I plan to acquire that prefer warmer waters. After over a day, the water is still only about 77.8 degrees, although it is getting gradually warmer. Is that the expected performance for such a heater? Is this a safety feature of some sort? Will it ever reach the set temperature? How should I set the thermostat to ensure the water is 80 +/- degrees? Link to comment Share on other sites More sharing options...
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