I have a 10gallon qt going, has been going for 3 weeks or so. I'm using an inkbird temperature controller with a 250w heater and a clip on fan. The temperature has been very stable with only +/- 1°. Tank has one tailspot blenny that is doing well, being treated for internal parasites. When I was feeding this morning I noticed the heater kicked on and I didn't think anything of it but when I went back later the cooling fan was on and the temp was reading 81.8°F. It brought it back down to 79°F and stopped. The only thing I can think of is the inkbird let the heater run too long but the heater should be set to 80. Or maybe the inkbird misread the temperature momentarily? The other issue I have is the heater I have in there is way out of calibration. Before I got the inkbird I had to set to like 72°F to keep the tank at 79°F. I used 4 different thermometers and averaged to calibrate the inkbird. I'm not sure what caused the temperature to get so high. I have an extra probe to test but I had to leave and now I'm wondering what happened. Has anyone had a similar experience?

