Adjustable Aquarium Heater for Small Fish Tanks (8-16 gallons)

Product Description Tips: The package includes a 4.6 ft power cord with a US standard plug, suitable for use in the US, Canada, and Mexico. The heater has a normal working accuracy of ±3°F, but its efficiency can be influenced by the tank size or ambient temperature.

Situation 1: If you have a small fish tank or the tank is located in a high ambient temperature room, please set the heater temperature lower than your desired temperature. Situation 2: If you have a large fish tank or the tank is located in a low ambient temperature room, please set the heater temperature higher than your desired temperature.

In either case, please monitor the water temperature changes and adjust the settings if it's your first time using this heater, to help create a comfortable and safe environment for your fish.

Quick Guide - Thermostatic Submersible Aquarium Heater: 1. Turn the blue button on the top of the heater to adjust the temperature as needed. The blue number displayed indicates the set temperature. 2. Fully submerge the heater upright in the water, ensuring the suction cup adheres to the tank's side. 3. Plug in the heater. It will take a few hours (depending on tank size and environment temperature) to heat the water to the set temperature. Please be patient. 4. To turn off the heater, unplug it before removing it from the water to avoid dry heating. 5. Unplug the heater 10 minutes before water changes.

Note: The heater can only function properly when fully submerged in water. Dry heating may cause the heater to burst.

The heater is designed for intermittent heating, working 5 minutes on and 2 minutes off (indicated by the light turning off). Do not worry when the heater stops and the light goes off - it will automatically restart heating after 2-3 minutes.

Maintenance: 1. Check the heater's working status regularly and unplug immediately if you notice any issues. 2. Clean the heater's suction cups every 3 months using 140°F warm water. 3. If you find any debris or algae on the heater, unplug it, wait 10 minutes, and clean it with fresh water, especially the heating part. 4. Do not use any other liquids to clean the heater, as they may damage it. 5. Ensure the heater is fully submerged in water, with the temperature sensor near the water flow or a suitable water pump, to ensure accurate temperature detection. 6. Do not put your hands in the water while the heater is operating, and unplug it before cleaning or maintaining the tank to avoid electric shock or burns. 7. Do not expose the heater above the water, as it could cause the glass and other parts to break.

More Indispensable Friendly Products in Aquariums: DOMICA offers a range of high-quality fish and aquatic pet supplies, including an Aquarium Heater with Digital Thermometer, Mini Fountain Pump, Wave Maker, Internal Aquarium Filter, Fountain Pump with Light, and Powerhead Pump.

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