Tetra 40-55 Submersible Heater

MAINTAINS HEAT: The HT20 uses a built in electronic theromstat to automatically maintain water at 78 degree F which is ideal for most tropical fish. No adjustment is requried.SIZE: Ideal for aquariums between 40 to 55 gallons with hoods or glass canopies.HEATING: Indicator light lets you know when water is being heated or when it is at the correct temperature.CONVENIENT: The HT heater is fully submersbile and can be installed vertically or horizontally. It’s small footprint makes it easy to conceal behind plants or other decor.DURABLE: Strong glass tube is heat and shock resistant.