Inland Seas Lifegard Aquatics Two 25 Watt (50 Watts Total) Pre-Set Quartz Glass Aquarium Heater Plus Bundle (4 Items)

This Bundle includes FOUR items: TWO Lifegard Aquatics 25 Watt Adjustable Quartz Glass Aquarium Heaters; a Stick on Thermometer & a Towel. Why would you want TWO 25 watt heaters instead of one 50 watt heater? Using more than one heater is advisable because heaters can fail, and having a second heater in the tank will keep your tank temperature from fluctuating wildly if one heater fails. Heater failure can either be one heater not turning off or one heater not turning on. Both are a problem, but usually a heater not turning off is a bigger problem, as it results in the tank overheating. If you have two 25 watt heaters, and one does not turn off, then the other should not turn on and your tank should not overheat. If, on the other hand, you just had one 50 watt heater and it didn't turn off, that could spell disaster. If one heater does not turn on, you will still have one heater working—which should be enough to avert a disaster. The heaters Set to 78 F. NOT adjustable. Length: 5.5" each. 50 watts total (25 watts each). For aquariums up to 20 gallons (assuming the temp needs be adjusted no more than 10 degrees). UL Listed. Quartz glass tube. LED power light (red in heating mode, green when temp achieved & yellow when outside of water). Thermal protection. The heater will automatically shut off if outside of water. Rubber suction cup holders included. The Stick on Thermometer sticks to the outside of the glass. It’s a very simple thermometer, but it has no battery or calibration to worry about, and the numbers are large and easy to read. The MarineAndReef.com Aquarium Cleaning Towel is a durable, lint-free microfiber towel. 19" X 15".

• This Bundle includes FOUR items: TWO Lifegard Aquatics 25 Watt Adjustable Quartz Glass Aquarium Heaters; a Stick on Thermometer & a Towel.
• Why would you want TWO 25 watt heaters instead of one 50 watt heater? Using more than one heater is advisable because heaters can fail, and having a second heater in the tank will keep your tank temperature from fluctuating wildly if one heater fails.
• Heater failure can either be one heater not turning off or one heater not turning on. Both are a problem, but usually a heater not turning off is a bigger problem, as it results in the tank overheating. If you have two 25 watt heaters, and one does not turn off, then the other should not turn on and your tank should not overheat. If, on the other hand, you just had one 50 watt heater and it didn't turn off, that could spell disaster. If one heater does not turn on, you will still have one heater
• The heaters Set to 78 F. NOT adjustable. Length: 5.5" each. 50 watts total (25 watts each). For aquariums up to 20 gallons (assuming the temp needs be adjusted no more than 10 degrees). UL Listed. Quartz glass tube. LED power light (red in heating mode, green when temp achieved & yellow when outside of water). Thermal protection. The heater will automatically shut off if outside of water. Rubber suction cup holders included.
• The Stick on Thermometer sticks to the outside of the glass. It’s a very simple thermometer, but it has no battery or calibration to worry about, and the numbers are large and easy to read. The MarineAndReef.com Aquarium Cleaning Towel is a durable, lint-free microfiber towel. 19" X 15".