Marineland Visi-Therm Submersible Aquarium Heater 50-Watt
Visi-Therm® Submersible Heaters from Marineland feature direct-set control, guaranteed durability, and certified accuracy to within one degree. Setting the temperature has never been easier. The easy click top dial now features calibrated marks to confirm your setting from the top, which compliment the traditional side viewing sliding scale. Visitherm Submersible Heaters are the perfect choice for beginners, and for longtime hobbyists alike, who appreciate the ability to easily see and change temperature settings.