Hygger 400W Aquarium Heater for Freshwater and Saltwater Tanks

The product description for the aquarium heater with its safety features, temperature control functions, and size recommendations can be presented in the following restructured format:

This adjustable aquarium heater comes equipped with several safety features to protect your aquatic pets. It features an automatic power-off and audible alarm function to prevent overheating. The dual temperature probes built into the heating rod immediately sense when the water temperature exceeds 94°F (34°C) and automatically stop the heating to avoid cooking the fish. The controller will then display the "HH" error code and flash "Hi" to alert the owner.

Similarly, the low temperature protection mechanism kicks in when the temperature probe detects the water dropping below 59°F (15°C). The heater will automatically start heating, while the controller sounds an audible alarm and displays the "LL" and "Low" error codes until the water temperature rises above 59°F.

The anti-dry operation function is another safety measure. When the temperature sensor detects a water shortage, the heater will automatically stop heating to prevent dry burning. The controller will sound an alarm, display the "L1" error code, and flash "Auto Off" to warn the user.

This heater is suitable for both freshwater and saltwater tanks, with wattage options ranging from 400W for 40-80 gallon tanks, 600W for 66-135 gallon tanks, 800W for 80-220 gallon tanks, and 1000W for 130-260 gallon tanks. The temperature control range is 59-90°F.

To ensure safety, the built-in dual temperature probes alternately measure the water temperature to prevent both overheating and overcooling. The audible alarm and automatic shut-off functions provide additional safeguards for your aquatic pets.

We offer a 12-month after-sales warranty, and if you have any questions, we will be responsible for resolving the issue.

When selecting the most suitable wattage, the formula is: Fish tank (length x height x width) + 1000 x 2 = the required wattage for the heating rod.

The external LCD digital controller allows for easy temperature monitoring and adjustment, with the ability to switch between Fahrenheit and Celsius. The separation of the heater and controller enhances the waterproofing of the aquarium heater, and you can set the temperature without getting your hands wet.

In addition to the safety features, the heater is designed for stable, fast, and even heat dissipation. The nickel-chromium electric heating wire, thickened quartz glass explosion-proof tube, and ABS plastic shell work together to generate heat efficiently and transfer it quickly to the water, while also protecting the heater from long-term wear and tear.

The memory function is another convenient feature, as the heater will remember the set temperature and resume operation after a power outage.

This adjustable aquarium heater comes with three suction cups, a controller bracket, and a hook, as well as a 10-foot power cord for easy installation.

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