![Aquarium Heaters & Chillers - Innovative Marine Helio PTC Smart Reef Aquarium Heater (400 Watt - [2 x 200W])](https://m.media-amazon.com/images/I/41S13Vubv3L._SL500_.jpg._AC_SL1500_.jpg)
Features
Rated for Aquarium Size: 50 - 100 Gallons *Based on +10°F water temperature increase from current ambient temperature.
Heating Element Dims: L 7" x D .80" | Remote Sensor Dims: L 2.3" x D .31" | Helio Smart Controller Dims: L 3.13" x W 1.31" x H 5"
Helio PTC Smart Controller Specifications: Factory Preset Temperature: 77°F | Factory Preset Low Alarm: 74°F | Factory Preset High Alarm: 80°F | Accuracy: < ±1°F | Resolution: 0.1°F | Calibration Range: ±9°F
Temp Set Range: 59° - 95°F | Low Alarm General Range: 57° - 93°F | Low Alarm Minimum Range: -2°F from Set Temperature
High Alarm General Range: 60° - 96°F | High Alarm Minimum Range: +1°F from Set Temperature
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