Water is always the right temperature for plants when gardeners use a Sunleaves Titanium Heater with Digital Thermostat! This heater uses a remote sensor probe to keep constant tabs on water temperature, while the titanium heating element maintains temperatures at a user-defined set point between 68° and 92° F. It shuts off automatically if it's removed from water or gets hotter than 95° F, and also features an overheat alarm. This 200W unit is rated 1.8 amps at 115 volts, and is recommended for 50-80 gallon reservoirs. Protected by a one-year manufacturer’s warranty.