Hygger Mini Quartz Glass Aquarium Heater with External Controller

Description Hygger mini quartz glass aquarium heater is specially designed for small and medium size tank use. This fish tank heater is very safe and durable, milky quartz material made, can resist a high temp of 1800℉, excellent in explosion-proof & shatter-resistant. The service life can be more than 3 years if only using in fresh water. There is a led indicator light on the temp controller. When the tank heater is heating, the indicator light is red. When it stops heating, the light is off. When does the heater stop and restart heating? The aquarium heater is very reliable to maintain the water temp as your set. It will stop heating when the water temp reaches to the set temp and will restart heating when the temp is 1.5-2℉ below the set temp. Over heat protection The aquarium heater will auto shut off once the water temp is over 97℉. How to adjust the temp? Rotate the knob on temp controller to set it to the desired temp. Temp range is 68-90℉. Size Chart Power & Tank: 50W (5-15gallon） 100W (10-30gallon) Heater Length: 5inch 7inch If the room temp is lower than 50℉, please buy a larger wattage heater. Do’s and Don’t’s 1. For better experience and aquarium safety, please carefully read and follow the user manual. 2. Keep the aquarium heater fully submerged in water. 3. Stick the heater horizontally or vertically onto the tank side near the water intake or on the way of water flow. 4. Don’t bury the heating rod in sand or stones. 5. Please keep the temp controller away from water. 6. Please don’t connect the power before the heater is well installed. 7. Please wait the heater rod to cool down before you move the heater or change the water.  Warnings and Warm Tips 1. For better experience and aquarium safety, please carefully read and follow the user manual. 2. Keep the aquarium heater fully submerged in water all time when it is working. 3. Stick the heater horizontally or vertically onto the tank side near the water intake or on the way of water flow. 4. Don’t bury the heating rod in sand or stones. 5. Please keep the temperature controller away from water. 6. Please don’t connect the power before the heater is well installed. 7. Please wait for 15 minutes or so to let the heater rod cool down before you moving the heater or changing the water.