Product Overview
The HiTauing Aquarium Heater is designed to maintain a stable and optimal temperature in your fish tank, suitable for both saltwater and freshwater environments. It features advanced safety mechanisms, including over-temperature protection and automatic power-off when not fully submerged, ensuring the well-being of your aquatic life.

Image: The HiTauing Aquarium Heater unit, showing the submersible heating rod connected to an external digital temperature controller.
Key Features
- Rapid Heating and Two Temperature Control System: Utilizes a stable nickel-chromium heating wire for quick and consistent heat distribution. Features a built-in temperature control system with both Fahrenheit and Celsius display (63-94℉/17-34℃).
- Intelligent Water Sensor and Over Temperature Protection: Automatically stops heating if the heater is out of water or exceeds the set temperature, indicated by a green light for enhanced safety.
- Explosion-proof Quartz Glass Aquarium Heater: Constructed with durable quartz glass and a high-temperature resistant nickel-chromium heating wire for longevity and safety. The outer shell is made of high-temperature resistant ABS material to prevent scalding.
- Accurate External Digital Display Controller: The external IC temperature controller provides a clear LED display of the current water temperature and the set temperature. Easily switch between Fahrenheit and Celsius by pressing and holding the button.
- Wide Range of Use: Suitable for various aquatic environments including fish tanks, aquariums, and small fish ponds. Equipped with strong suction cups for secure installation.

Image: An illustrative diagram highlighting the main features of the aquarium heater, including its digital display, safety functions, and durable construction.
Setup and Installation
Proper installation is crucial for the safe and effective operation of your HiTauing Aquarium Heater. Please follow these steps carefully:
- Ensure the aquarium heater is completely submerged in the water before plugging it into the power source. The heater must be fully covered by water at all times during operation.
- When performing water changes or any maintenance that lowers the water level, always unplug the power switch to the heater first. This prevents the heater from operating dry, which can cause damage or safety hazards.
- Use the provided strong suction cups to securely attach the heater to the tank walls or bottom. Ensure it is placed in an area with good water circulation for even heat distribution.

Image: Visual guide showing correct installation methods (fully submerged) and incorrect methods (partially submerged or out of water) for the aquarium heater.
Operating Instructions
Temperature Control and Display
The external digital controller allows for precise temperature management. The display shows two red LED digits: the top number indicates the current water temperature, and the bottom number indicates the set target temperature.
- Switching Temperature Units: To switch between Fahrenheit (℉) and Celsius (℃), press and hold the button next to the controller for 2-3 seconds.
- Setting Temperature: To set your desired temperature, repeatedly press the button on the controller. The display will cycle through available temperatures. Once your desired temperature is shown, stop pressing the button; the setting will be saved, and the display will revert to showing the current water temperature.
- Heating Indicator: A red light on the controller indicates that the heater is actively heating the water. When the target temperature is reached, the light will turn green, and the heater will stop heating.

Image: A detailed view of the external digital controller, showing the LED display with current and set temperatures, and the control button.
Safety Functions
Your HiTauing Aquarium Heater is equipped with intelligent safety features:
- Over-Temperature Protection: If the water temperature exceeds the set temperature by 1°F (or 1°C), the heater will automatically stop heating. It will resume heating when the water temperature drops 1°F (or 1°C) below the set temperature. This is indicated by the red light turning green.
- Anti-Dry Burning Function: If the heater is not fully submerged (e.g., 5cm above the water surface), it will automatically power off to prevent dry burning. The controller will display "E1" to indicate this condition. The heater will resume normal operation once fully submerged again.

Image: An illustration demonstrating how the over-temperature protection works, showing temperature thresholds for automatic heating and stopping.

Image: An illustration showing the anti-dry burning function, where the heater powers off if not fully submerged and displays an "E1" error.
Official Product Video: Double Digital Display Precision Control Aquarium Heater
Video: This official seller video demonstrates the functionality of the double digital display and precision control features of the HiTauing Aquarium Heater, showing how to set and monitor the temperature.
Maintenance
Regular maintenance ensures the longevity and efficiency of your aquarium heater:
- Cleaning: Periodically clean the heater surface to remove algae or mineral buildup. Always unplug the heater and allow it to cool completely before removing it from the water for cleaning. Use a soft cloth or brush and warm water; avoid abrasive cleaners.
- Submersion: Always ensure the heater remains fully submerged during operation. If the water level drops, the anti-dry burning function will activate, but consistent proper submersion is recommended.
- Cable Inspection: Regularly inspect the power cable and controller for any signs of damage, fraying, or wear. Do not use the heater if any part is damaged.
Troubleshooting
If you encounter issues with your HiTauing Aquarium Heater, refer to the following common problems and solutions:
| Problem | Possible Cause | Solution |
|---|---|---|
| Heater not heating / Display shows "E1" | Heater is not fully submerged in water. | Ensure the heater is completely submerged. Add water to the tank if necessary. The heater will resume operation once fully submerged. |
| Water temperature is too high / Heater not turning off | Over-temperature protection activated or heater malfunction. | The heater is designed to stop heating if the water temperature exceeds the set point by 1°F/C. If the temperature continues to rise significantly beyond the set point, unplug the heater immediately and contact customer support. |
| Temperature display is inaccurate | Sensor interference or external factors. | Ensure the heater's sensor is not obstructed. Verify the temperature with a separate, reliable aquarium thermometer. If discrepancies persist, contact customer support. |
| Suction cups not holding securely | Surface is dirty or suction cups are worn. | Clean the tank surface where the suction cups will be placed. Ensure suction cups are clean and free of debris. If they are worn, replacement suction cups may be needed. |
For issues not listed here or if troubleshooting steps do not resolve the problem, please refer to the Warranty and Support section for further assistance.
Specifications
| Specification | Value |
|---|---|
| Model Number | AP-02 200W |
| Item Weight | 1.19 pounds |
| Item Package Dimensions L x W x H | 11.34 x 6.1 x 2.64 inches |
| Temperature Control Range | 63-94℉ / 17-34℃ |
| Waterproof Grade | IPX8 |
| Manufacturer | HiTauing |
| First Available Date | August 6, 2021 |

Image: A table detailing product parameters such as power, fish tank water range, heater length, temperature control range, voltage, error range, and waterproof grade for various wattage models.
Warranty and Support
The HiTauing Aquarium Heater comes with an 18-month warranty from the date of purchase. This warranty covers manufacturing defects and issues arising from normal use.
For warranty claims, technical support, or any questions regarding your product, please contact HiTauing customer service through the retailer where you purchased the product or visit the official HiTauing website.
You can also download the official User Manual (PDF) for more detailed information: Download User Manual (PDF)



