Do you have another thermometer you could check it with? A non-digital one maybe?
No, but I was going to pick one up tomorrow and check it.Do you have another thermometer you could check it with? A non-digital one maybe?
Must be a model thing. It came recommended, and I know that the internal thermometer in those is never accurate. The important part is keeping it stable.I have the exact same heater with the exact same problem. When I had it in my 5gallon I had to keep it set at 72f to maintain an 80f temperature.