Review on 🐠 DaToo Mini Betta Flat Fish Tank Heater - Efficient 10W to 30W Small Aquarium Heater by Sabrina White

I used to buy one for my rooster fish which comes in a 1 1/2 gallon plastic tank. I have now set up an aquarium for my other betta and knew I should get another one! This heater is perfect. Heats water without getting hot or hot on the sides of the tank. It automatically adjusts the temperature, which is very convenient. Although it's a large rectangle, it's relatively flat and fits the back of my triangular tank just below the pump. Although it covers most of the aquarium wall, it is flat and occupies very little water surface. I'm sure my dwarf fish will appreciate it!