Details Description One of our best selling heaters. We love titanium heaters because they look good, function well, and are durable. Better yet, this one features a digital controller and independent thermometer probe for the best accuracy possible. Thermostat memory. When the unit loses power, the thermostat setting is saved when power resumes. Ultra tough titanium construct Easy-to-read temperature indicator Temperature range is 68F – 92F Remote sensor for accurate temperatures For fresh or saltwater systems Specifications Model Wattage Tank Volume Heater Length TH-C100 100 W up to 35 gallons 6.5″ TH-C200 200 W up to 55gallons 10.25″ TH-C300 300 W up to 100gallons 11.5″ TH-C400 400 W up to 125gallons 13.8″ TH-C500 500 W up to 150gallons 15″