Marineland Visi-Therm Submersible Heaters

Marineland Visi-Therm Submersible Heaters feature direct-set control, guaranteed durability, and certified accuracy to within one degree. Setting the temperature has never been easier. The "click" top dial now features calibrated marks to confirm your setting at the top, that compliments the traditional side-viewing sliding scale. They are the perfect choice for beginners and for longtime hobbyists alike who appreciate the ability to easily see and change temperature settings. The advanced mounting bracket provides three window positions to view the temperature display from multiple angles. The Triac equipped thermostat switches the heaters on and off with lower voltage for superior reliability and performance, and the new, mesh heating element (with mica core coupled with epoxy fill) ensures the most efficient heat transfer and eliminates rattling coils. With an LED on/off light to indicate clearly when the heater is operating. Double-strength glass casing for extra durability. No other aquarium heater is so easy to install, so easy to set, and so easy to use on a daily basis. cUL approved for safe operation in both freshwater and marine aquariums. 250 Watt model is ideal for aquariums up to 70 gallons.