Review on 🐠 Woliver Aquarium Heater: Submersible Fish Tank Heater with Digital Temp Controller - Perfect for Saltwater, Freshwater, and Turtle Tanks by Amanda Austin

This is a good little heater that works well in my 3 gallon beta bowl. I have never used heaters on my Betas and have found that they don't move much in cold weather but when the temperature is right they become more active and I will be using this throughout the summer (we have a cool dog at home with) . very thick skin). It is easy to use and has a suction cup that can be attached to the tube. A great little investment for fish that can't stand the cold.