Mini Aquarium Heater Adjustable 25W Submersible Fish Tank Heater with LED Digital Display, Turtle Tank Heater Small Aquarium Heater, Ideal for 2-5 Gallons Tanks

Easy to use, works well, keeps the tank at the proper temperature. It’s about 2inches each side so not too big. The suction cups seem to be deep so they should last a long time. Good value for the money as long as it lasts! (Will update if the heater dies.)

I recently purchased the FUMAK Mini Aquarium Heater for my 4-gallon betta tank, and it has been working great. After setting the temperature, it has remained accurate, ensuring a stable environment for my betta.The heater is easy to use and the LED digital display makes it simple to monitor the temperature. It's designed for small tanks, and the 50W power is perfect for my setup. I appreciate its compact size, which fits well in my tank without taking up too much space.So far, there have been no malfunctions, and the heater has been reliable in maintaining the desired temperature. It's a solid choice for anyone with a small aquarium looking for an efficient and accurate heating solution.Overall, I highly recommend the FUMAK Mini Aquarium Heater for anyone with a 5-10 gallon tank. It’s reliable, accurate, and easy to use, making it an excellent addition to any small aquarium setup.

Works perfect and for a great price! Highly recommend

As described

I was really excited to get this heater for my betta fish, however it doesn’t work. I have the temp set for 78 and it’s not heating the tank despite having it in there for 2 days. I thought it’d take awhile to heat up. A bit disappointed

I wanted a small replacement heater for my 5 gal betta tank. It’s quite a bit bigger than expected but it works fine.

I am extremely happy with this heater. Easy to use, just set it to the temp you want,you never have to second guess it,or keep checking it. #1 heater.

I had no issues getting this thing going. It works well and keeps the temp regulated…so far so good. One of my fish likes to hang out behind it too, but I’m not sure why.