It's been in my 10 gallon tank for 5 days and the red light never goes out I have 2 thermometers in my tank reading 75Β° wow the heater is set to 83Β°, it might be a bit cold in my room because it's always at 71, so I'm pretty sure I have the right size heater, maybe I just got 41, I'll be back when something better happens
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