Details Description The AquaEl ULTRA Heaterfully submersible electronic heaters feature a modern, super flat design with an easy to set “one touch” control system. The advanced electronic thermostat is accurate to 0.5 and includes a LED that displays both the Set Temp and Tank Temp simultaneously and has a Set temperature range from 66 up to 96. For ultimate safety and reliability, integrated thermal protection circuitry shut the heater down before it can overheat and its shatterproof outer casing make the ULTRA Heatervirtually indestructible. Perfect for freshwater and saltwater aquariums and terrariums. Available in 25-200 watt sizes. 3 year warranty. Modern, super flat design Easy to set “one touch” system Accurate electronic thermostat0.5F LED displays both Set Temp and Aquarium Temp simultaneously Set temperature range from 66 to 96F Thermal protection circuitry Shatterproof outer casing Specifications 25 watt: up to 6 gallons 50 watt: up to 12 gallons 75 watt: up to 20 gallons 100 watt: up to 29 gallons 150 watt: up to 40 gallons 200 watt: up to 55 gallons 300 watt: up to 80 gallons (dual 150 watt heaters with a single controller, connected with a 4′ cord) SPECIAL NOTE for use with Aquarium Controllers:APEX users: Please be sure to plug your Neo-Therm into plug 4 or 8.Digital Aquatics users: Neo-Therms can be plugged into any port without issue.