Slim Heater for Bettas and Bowls - 7.5W - Up to 5 gal.
The UL listed heater measures 4 in. x 4.5 in.
For complete product information, download the instruction manual.
Ratings & Reviews
I agree with yoyo that it's discrete. It's also looks nice. It's seems like it's hotter than it should be though...The temperature in my apt. is 73, but the temperature in the tank with the slim heater is 82. Well, I do have the tank close to an air conditioning vent, but that seems like it would make it cooler.
pratical, one could hide the thermometer in the sand or stones. but there is no regulater to set the temperture so when its warm enough I just plug it off.