yup! that is exactly what mine was doing. I have 2 small fans over my sump. i was preparing for summer heat threats, i came home to those on, heaters off, and a reading of 79.3. I unplugged everything, threw in 250 watts worth of heaters i had from my mixing supplies, to limp along until i can come up with a better solution.Here is one that hasn’t been removed yet it say’s my tank is 111 deg.. lol
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