Item # 257574 / Manufacturer Part # T20101
A 7.5 watt Slim Heater is ideal for your betta or small fish bowl 2 to 5 gallons in size. Bettas thrive in warm water, so it?s best to keep a small heater in your bowl. Shock proof heater is shaped to fit easily into a round fish bowl, above or below the substrate. Perfect for glass, acrylic, or plastic bowls. Cord attaches to heater at 90 degree angle, so there?s no extra adjusting or awkward positioning.
The UL listed heater measures 4 in. x 4.5 in.
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.
slim heater 4/8/2013
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.