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· Registered
2,195 Posts
Sounds like a bad heater. Here is one way to check: Unplug it, remove it from the tank and monitor the situation. If the tank still stays that hot then it is the motors of whatever pumps, filters etc you have running that are heating up the tank. If the tank cools to about room temperature then the heater was coming on (even set so low) and is faulty.
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