GOOBAT Small Submersible Aquarium Heater, Aquatic Turtle Heater with Intelligent LED Temperature, Thermometer and Adjustable Temperature Controller for 2-30 Gallon Aquariums

I've bought three of these fish tank heaters and I can honestly say that I LOVE them! Easy to read numbers and light tells me exactly what temperature my tank is at. The suction cups I wish they sold separately because they're really high quality.My filter malfunctioned on my 40 gallon which caused it to leak out into the floor. The heater has a sensor in it that can detect when the water is too low and it turned off. Its good to know if something like that happens again I don't need to worry about the heater.

This heater is rated from 2-70 gallons. I am using it in a 55 gallon tank with approximately 20 gallons of water for turtle. The heater can not seem to maintain the 80 degree temp required for the water.UPDATE. Turns out I did not order the heater with the proper wattage for my tank. Which explains the why the heater would not maintain the temp. I purchased a 25w heater instead of the 100w needed. I apologize for any confusion.

Our turtle likes this heater. he hangs out near the heater in the water on cold days. Easy to use, drop in water and set temp. it works that easy.Con: the 4-page operation manual is way too small type font to read

Small, compact & easy to put together & use. But hard to read the temp when submerged in turtle tank. I got a weaker watt but even so it does the job & less risk of over heating my turtle.

The heater has worked well, seems to be good quality and maintains the water temperature accurately. I also like that it's submersible and easy to read and operate.

I like that is has a display but I have had it in the water now for about 20 hours and it’s only come up 3° This is a very small heater and you must scroll down in the ad for it to see that it does not support a very large tank. Display is great but it’s very very slow. I have it turned up to 80° it started at 62° and 20 hours later I’m at 65°.

I am using this heater in my 10 gal. aquarium. and so far it is working perfectly. I'll let you know more this winter when it gets cold and is really put to the test.

I ended up returning this, and go a reptile specific water heater. I have used many heaters for my fish tanks and reptile habitats, this one I was not comfortable with and it was funky in size and usage. Might work for some people, I personalyl did not like it and wont ever buy another one.