Product: hygger 300W Controllable Aquarium Heater, Submersible Quartz Thermostat with Built-in Thermometer for Fish Tank 30-60 Gallon, for Fresh Water, Salt Water
Brand: hygger
Hygger compact aquarium 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.

Led indicator light inside the quartz tube.
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 is 1.5-2℉ above 
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℉, a spare circuit in the controller will take work to turn it off in case of fault occurs.
How to adjust the temp?
? Rotate the knob on temp controller to set the desired temp. Temp range is 75-91℉.

Size Chart
Power & Tank: 100W (10-30gallon) 300W (30-60gallon)
Heater Length: 8.5 inch 10.6 inch
 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 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 heating rod to cool down before you move the heater or change the water.

Specification:
 Voltage: 100-120V 
Frequency: 60HZ 
Cable Length: 5.4ft
Warranty Period: 1 years
Package Includes: 1 Aquarium Heater, 1 Shield, 2 Suction Cups, 1 User Manual
For Fish Tank 30-60 gallon, suitable for fresh water or marine aquariums. 300W aquarium heater, the heating rod length is 10.6inch
Fully submersible heater will auto shut off once the water temp is over 97℉
With a detachable platic guard, well protect fish and the heater
Set the temp on an external controller: 75, 77, 79, 81, 83, 85, 87, 89, 91
The power cord is 5.4ft enough long for most fish tank.

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