marineland Precision aquarium Heater, up to 12 gallons, 50-Watts

<p>Get precise control of your aquarium temperature with the Precision Submersible Heater. This Heater combines an adjustable temperature dial, a high visibility temperature display and an advanced heating element to keep your aquarium water at the optimal temperature for your freshwater or saltwater fish. The Precision heater also includes a thermal switch which will turn off once it rises above an internal pre-set temperature, and turns back on once it cools down, making your aquarium safer for you and your fish.</p>

• This 50 watt heater is for aquariums up to 12 gallons. Adjustable temperature dial allows you to set the temperature 1 degree with every click
• Thermal Switch automatically turns off as temperature rises above an internal preset and turns back on once it cools down
• The advanced heating element contains a mica core surrounded by a mesh heating element for superior heat transfer with enhanced durability and marineland.
• Advanced mounting bracket securely attaches to glass and provides 3 window positions to view the temperature display
• Easy to view sliding scale tells the exact temperature setting. Top dial view shows the setting from an additional location