Review on 🐠 Hygger 500W 800W Submersible Fish Tank Water Heater with LED Digital Temperature Controller - Ideal for Saltwater and Freshwater Aquariums, Fast Heating for 60~180 Gallon Tanks by Molly Carlson

This heater is a bee's knees. In fact, I'm running it on a tank it's not designed for. I have a 480 gallon tank with a 180 gallon pan. However, this heater is able to keep my fish tank stable within 0.1 degrees. It is also capable of increasing the total water volume by 1 degree every 15 minutes, which is a truly remarkable feat. It appears to be an ABS plastic construction that's as tough as a football helmet. I absolutely love this product. The only thing that could improve it is an external thermostat sensor, like another Hygger quartz heater model.