Hygger submersible fish tank heater uses explosion-proof quartz glass and a high-temperature resistant nickel-chromium heating wire combine to distribute heat quickly and efficiently creating a comfortable aquatic for your lovely fish. This aquarium heater also features an adjustable LED digital controller that displays real-time water temperature and set temperature.

·Built-in temperature probe.

·Adjust the temperature from 59~93°F (15~34°C).

·Preset prevents too high-temperature setting.

·Pressing and holding the button for 5 seconds changes it from F to C readouts.

·PC plastic guard has high-temperature resistance and protects your fish get burnt.

·The hang hole of the controller is convenient for you to hang it up.

·With 2 strong suction cups can be easily mounted heater element to the tank wall.

Multi-function: 1. temp setting remembers 2. running-dry protection 3. overheating protection.

More Details with Our Submersible Fish Heater

Important Tips for Using Aquarium Heater

1. Always unplug your heater first before carrying out any water change then plug it back in when the heater is fully submerged.

2. Let the heater cool for at least 15 minutes before removing it from the aquarium.

3. Make sure the heater rod does not touch the sand or gravel on the tank bottom because the heat difference will likely crack your heater glass.

4. The heater must be fully submerged underwater at least 5 inches all the time, the plastic guard will be melted if the heater is exposed to the air when it's heating or not cooling down.

5. Keep water in circulation for better distribution of the heat.

6. To avoid the device overheating and ensure its better performance, it’s better to put it close to the tank filter.

·100-watt heater suitable for 10-25 gallons marine and freshwater tanks.

·200-watt heater suitable for 25-50 gallons marine and freshwater tanks.

·300-watt heater suitable for 40-75 gallons marine and freshwater tanks.

·500-watt heater suitable for 66-120 gallons marine and freshwater tanks.

·800-watt heater suitable for 80-190 gallons of marine and freshwater tanks.