Review on hygger 50W Mini Submersible Digital Display Aquarium Heater: Compact, Fast Heating & Thermoregulation for 🐠 Small Fish Tanks, with External Controller & Built-in Thermometer - Ideal for Betta and Turtle Tanks by Christy Jordan

I have a 5 gallon hospital aquarium that I was having trouble finding a heater for. This was not because there were no other heaters, but mainly because of their material and temperature fluctuations. I received the Hygger heater about 1 week ago and it is PHENOMENAL. It maintained its temperature even when I dropped the room temperature. The rest of the heaters covered themselves in a film in a couple of days which almost ended up clogging my filter. This heater does not have this problem. Another great feature is the digital temperature display, which eliminates the need for a thermometer. Now I'm hoping they build one for the 125 gallon tank. I HIGHLY RECOMMEND THIS HEATER!