Visi-Therm Deluxe – an advanced-compact design, double-sealed submersible aquarium heater.

Visi-therms water-calibrated thermostat is certified accurate to within one degree, ensuring precise temperature selection and superior performance.

The Visi-Therm Deluxe delivers the ultimate in direct-set control, with a simple "click" of the dial; you choose the ideal water temperature. The Visi-Therm Deluxe durable design is held to exacting standards for accuracy, extended submersion and operational safety.