Review on 🐠 Certified hygger Aquarium Heater - Reliable Thermostat Heater for Small Betta Coral Saltwater and Freshwater Tanks by Michelle Jackson

The construction seems solid. First let me say that, so far for the price, this thing holds the temperature in a 35 gallon tank very well. However. The dial and temperature gauge, which runs the length of the device, are grossly inaccurate. About 11 degrees is inaccurate. I'm glad I spent the day at home installing this; I set these to a setting of around 78 degrees and after almost 6 hours my tank was almost at 90 degrees. I turned the fan on the tank to the minimum and had to micro-adjust the dial. At the preferred level of 80 to 82 degrees, the dial will set just under 70 degrees. In short, great value for money but don't trust the dial and don't leave it alone for the first 12 hours unless you want cooked fish. .