IM Helio PTC Heating System

50 Watt (Up to 20 Gallons) 100 Watt (10-25 Gallons) 200 Watt (2 x 100W: 25-50 Gallons) 200 Watt (25-50 Gallons) 400 Watt (2 x 200W: 50-100 Gallons) 350 Watt (50-85 Gallons) 500 Watt (55-125 Gallons) 700 Watt (2 x 350W: 100-170 Gallons)