Review on 🐠 Upgraded YukiHalu Small Size Submersible Aquarium Heater | Mini Fish Tank Heater 50W/100W with Built-in Thermometer, External Temperature Controller | Dual LED Temperature Display | Ideal for Fish & Turtles by Joe Pettigrew

I have a betta fish in the office, Carl, who lives in a large 8 gallon aquarium. I still have to turn on the heat in my office because in Ohio temperatures drop to 40 and 50 degrees at night, but still climb to 60 and sometimes 70 degrees during the day. What I didn't realize was that poor Carl was having significant changes in water temperature, causing his health to deteriorate. Fortunately, I managed to catch him and immediately ordered him a tank heater, which will help regulate the water temperature to the optimal temperature of 80 degrees. Since then he has been much more active, swimming, eating and looking 100 times better. It was very easy to install, heated the water quickly and made a huge difference in his quality of life. Highly recommended!