Visi-Therm® Deluxe submersible aquarium heater For years, the name "Visi-Therm" has been the industry standard for excellence in aquarium heater performance and reliability.

Water-calibrated to ensure precise temperature selection and superior performance, the Visi-Therm Deluxe delivers the ultimate in direct-set control, compact double-sealed durability...and certified accuracy to within one degree. With a simple "click" of the dial, you choose the ideal water temperature.

The custom Double-Suction Mounting Bracket features an adjustable three-position window that ensures easy-to-view temperature setting.

And, of course, every Visi-Therm Deluxe is CSA listed... designed to exacting standards for extended submersion and operational safety. It is available in 25, 50, 75, 100, 150, 200, 250 & 300 watt sizes.