300-Watt heater designed for aquariums up to 100 US Gal / 378.5 L Displays water temperature digitally in Celsius or Fahrenheit Precision temperature control allows for increments (+ or -) of 0.5 degrees VueTech® system will change display colors if set temperature varies +/- 1°C or +/- 2°F (blue = low, green = safe zone, red = high) Integrated fish guard provides added protection Slim mounting bracket For use in freshwater and saltwater aquariums