1. Introduction
Thank you for choosing the fishkeeper 800W Aquarium Heater. This device is designed to maintain a stable and optimal temperature for your aquatic environment, ensuring the well-being of your fish and other aquatic creatures. This manual provides essential information for the safe and efficient operation of your heater. Please read it thoroughly before installation and use.
Image 1: The fishkeeper 800W Aquarium Heater with its external digital temperature controller.
2. Safety Information
- Always ensure the heater is fully submerged in water before connecting it to power. Operating the heater out of water can cause damage and poses a fire hazard.
- Do not operate the heater if the power cord or plug is damaged.
- Disconnect power to the heater and all other aquarium equipment before performing any maintenance or handling the heater.
- This heater is designed for indoor use in aquariums only. Do not use it for other purposes or in outdoor ponds unless specifically rated for such use.
- Keep out of reach of children.
- The heater features a protective guard to prevent fish from direct contact with the heating element. Do not remove this guard.
3. Package Contents
- 1 x fishkeeper 800W Aquarium Heater
- 1 x External Digital Temperature Controller
- Instruction Manual (this document)
4. Product Features
- Digital Display Temperature Controller: An external LED digital controller allows for easy temperature setting and monitoring. The display shows both current and set temperatures.
- Multiple Safety Protection: Includes high temperature, low temperature, and dry burn prevention. The controller displays specific codes for alarms.
- Power Failure Memory Protection: Retains the last set temperature after a power outage, eliminating the need for manual reset.
- Quartz Material - Fast Heating: Constructed from explosion-proof quartz glass and high-temperature resistant Nichrome heating wire with silicon carbide for efficient and safe heating.
- Protective Guard: High-quality ABS heater guard protects aquatic life from scalding.
- Wide Application: Suitable for saltwater aquariums, freshwater aquariums, planted tanks, turtle tanks, and ponds.
5. Setup
- Placement: Position the heater vertically or horizontally within your aquarium. Ensure it is fully submerged in water. Adequate water circulation around the heater is crucial for even heat distribution.
- Mounting: Use the provided suction cups to securely attach the heater to the aquarium glass.
- Controller Placement: Place the external digital temperature controller in a dry location, away from water splashes.
- Power Connection: Once the heater is fully submerged and securely placed, plug the heater's power cord into a grounded electrical outlet.
Image 2: Illustration of correct heater placement (fully submerged) and incorrect placement (partially submerged).
6. Operating Instructions
Setting the Temperature:
- The external digital controller displays the current water temperature (Curr. Temp) and the set temperature (Set Temp).
- To adjust the set temperature, press the "+" button to increase the temperature or the "-" button to decrease it. Each press adjusts the temperature by 1°F.
- The temperature range is typically between 59°F (15°C) and 93°F (34°C). If you press below 59°F or above 93°F, the setting will cycle back to the other end of the range.
- When the current water temperature is below the set temperature, the display will flash, indicating the heater is actively heating.
- Once the set temperature is reached, the display will stop flashing, indicating the heater is maintaining a constant temperature and has stopped heating.
Image 3: Close-up of the digital display controller, illustrating temperature adjustment buttons and display readings.
Power Failure Memory:
In the event of a power interruption, the heater's controller will automatically recall the last set temperature once power is restored. This prevents the need for manual resetting and helps maintain stable water conditions.
Image 4: Visual representation of the power failure memory function, demonstrating temperature retention after a power outage.
7. Maintenance
- Regularly inspect the heater for any signs of damage, such as cracks in the glass or frayed cords. Discontinue use immediately if damage is found.
- Periodically clean the heater's protective guard to prevent algae or debris buildup, which can hinder heating efficiency. Always unplug the heater and allow it to cool before cleaning.
- Use a soft brush or cloth to gently remove any deposits. Do not use harsh chemicals or abrasive materials.
- Ensure the heater remains fully submerged during operation. Check water levels regularly.
8. Troubleshooting
The digital controller provides error codes to help diagnose issues:
| Error Code | Description | Action |
|---|---|---|
| HH | High Temperature Alarm: Current water temperature is higher than 93°F (34°C). | The heater will stop heating. Check ambient room temperature and ensure proper water circulation. If the temperature remains high, consider reducing the set temperature or checking for external heat sources. |
| LL | Low Temperature Alarm: Current water temperature is lower than 59°F (15°C). | The heater will continue normal heating. Ensure the heater is adequately sized for your tank volume and ambient conditions. Check if the set temperature is appropriate. |
| E1 | Off-Water Cut-off Protection: Heater is not fully submerged (e.g., 2 inches away from the water surface). | The heater will automatically cut off power to prevent dry burning. Immediately unplug the heater, allow it to cool, then re-submerge it completely and check water levels before plugging it back in. |
| EE | Two probe temperature difference of 5 degrees. | Contact customer support. |
| H1 | Temperature sensor 1 short circuit fault. | Contact customer support. |
| H2 | Temperature sensor 2 short circuit fault. | Contact customer support. |
| E2 | Temperature sensor 1 open-circuit fault. | Contact customer support. |
| E3 | Temperature sensor 2 open-circuit fault. | Contact customer support. |
| E4 | Overvoltage fault. | Check power supply. If issue persists, contact customer support. |
Image 5: Visual guide to the heater's safety alarms and corresponding error codes.
9. Specifications
| Feature | Detail |
|---|---|
| Model Number | FK037 |
| Power | 800W |
| Recommended Tank Size | 80-220 Gallons |
| Temperature Range | 59°F - 93°F (15°C - 34°C) |
| Material | Explosion-proof Quartz Glass, ABS Protective Guard |
| Item Weight | 2.75 pounds |
| Item Package Dimensions | 17.09 x 8.66 x 2.24 inches |
| Manufacturer | fishkeeper |
10. Official Product Video
Video 1: An official product video demonstrating the features and operation of the fishkeeper Aquarium Heater.
11. Warranty and Support
The fishkeeper Aquarium Heater is covered by a standard manufacturer's warranty. For specific warranty details, please refer to the product packaging or contact fishkeeper customer support.
If you encounter any issues or have questions regarding your product, please contact fishkeeper customer support through the retailer's platform or the official fishkeeper website. Please have your model number (FK037) and purchase information ready.