Maintaining proper nutrient solution temperature is simple with a Titanium Reservoir heater. The Titanium reservoir heater can be set between 68 and 93 degrees F and feature a calibrated external temperature control dial, on/off indicator light, shatter-proof stainless steel heating element and remote temperature sensor. Each Titanium Reservoir Heater includes two suction cup mounts for heating element and one suction cup mount for remote sensor. Good up to 65 gallons.