Review on 🐠 EHEIM Jager Aquarium Thermostat Heater 100W: Reliable and Efficient Heating for Your Aquarium by Jennifer Wurz

The first one I received got so hot over the set temperature that I turned the calibration setting to the maximum and had to adjust two more degrees lower than the actual temp (I set it to 73 but the tank temp was at 75). I thought I would just leave it like that but then after about 3 or 4 days the temp suddenly started dropping to the point where I had to raise it to 77 to keep my tank at 75. At this point I brought it up the back. for new ones. I've been using the new one for about three or four days now and it's working great. I calibrated it the day I started using it and it has held the correct temperature ever since. I will update this review if anything changes.