1. Introduction
This manual provides essential information for the safe and efficient operation of your hygger Adjustable Dual Outlet Aquarium Air Pump Kit. This air pump is designed to aerate aquarium water, improve circulation, and provide oxygen for aquatic life in both freshwater and marine environments. Please read these instructions thoroughly before installation and use.
2. Safety Instructions
- Non-Submersible: The air pump is not waterproof and must not be submerged in water. Keep it away from water sources.
- Placement: Always place the air pump above the water level of the aquarium to prevent water back-siphoning, especially during power outages. If placing below water level, a check valve is mandatory.
- Power Supply: Ensure the power supply matches the pump's voltage requirements.
- Damage Inspection: Before use, inspect the pump and all components for any damage. Do not operate if damaged.
- Children and Pets: Keep the device out of reach of children and pets.
- Noise Reduction: To reduce operational noise, place a soft towel or mat underneath the pump.
3. Package Contents
Verify that all items are present in the package:
- 1 x hygger Air Pump
- 2 x Air Tubes (1.5M long each)
- 2 x 4cm Air Stones
- 2 x Check Valves
- 2 x Suction Cups
- 1 x User Manual

Image: All components included in the hygger Air Pump Kit: air pump, air tubes, air stones, check valves, suction cups, and user manual.
4. Specifications
| Feature | Value (140 GPH, 5W Model) |
|---|---|
| Pressure | 20 Kpa |
| Flow Rate | 140 GPH |
| Size | 7.3"L x 3.7"W x 4.3"H |
| Cord Length | 1.5 M |
| Maximum Noise Level | ≤ 48 dB |
| Power | 5 Watt |
| Recommended Aquarium Size | 20-120 Gallons |

Image: A table comparing specifications for 5W (140 GPH) and 8W (250 GPH) hygger air pump models, highlighting pressure, flow rate, size, cord length, and maximum noise level.
5. Setup and Installation
Follow these steps for proper installation of your hygger air pump:
- Prepare Air Stones: Soak the two air stones in water for 1-2 hours before use. This helps ensure optimal bubble diffusion.
- Connect Air Tubing: Connect one end of each air tube to the dual outlets on the air pump.
- Install Check Valves (Optional but Recommended):
- If the air pump is placed below the aquarium water level, a check valve is mandatory to prevent water from siphoning back into the pump during a power outage. Cut each air tube and insert a check valve in line, ensuring the arrow on the check valve points towards the aquarium.
- If the air pump is placed above the aquarium water level, check valves are not strictly necessary but are still recommended for added safety.
- Attach Air Stones: Connect the other end of each air tube (or the check valve if used) to an air stone.
- Position Air Stones: Place the air stones at the desired location within your aquarium. Use the provided suction cups to secure air tubing along the tank walls if needed for a tidy setup.
- Position Air Pump: Place the air pump on a stable, dry surface. Ensure it is positioned higher than the aquarium water level if no check valve is used. If a check valve is installed, the pump can be placed anywhere, but keep it dry.
- Power On: Plug the air pump into a suitable power outlet.

Image: A visual guide illustrating the connection of air tubes, check valves, and air stones to the pump, showing both above-water and below-water placement options.

Image: A six-step visual guide demonstrating how to connect air tubings, cut tubes, install check valves, connect air stones, and plug in the air pump.
6. Operation
6.1 Adjusting Air Flow
The hygger air pump features a built-in flow control dial to adjust the air output. Rotate the dial to increase or decrease the airflow according to your aquarium's needs and the requirements of any connected air-driven equipment or ornaments.

Image: A hand adjusting the bubble control dial on the hygger air pump, showing the range from low to high airflow and corresponding bubble intensity in an aquarium.
6.2 Dual Outlet Functionality
The pump is equipped with dual outlets, allowing it to power two separate air accessories simultaneously. This is ideal for providing oxygen to two smaller fish tanks or for distributing air across a larger single tank. Alternatively, you can combine both outlets into a single, more powerful output using a T or Y connector (not included).

Image: A diagram illustrating the dual outlets of the hygger air pump providing consistent and sufficient airflow to two separate air accessories in an aquarium, reaching a depth of up to 4.9 feet.
6.3 Compatibility
This air pump is compatible with various aquarium air-driven equipment, including:
- Air Stones
- Sponge Filters
- Aquarium Ornaments (e.g., bubblers)
- Undergravel Filters

Image: The hygger air pump shown alongside examples of compatible accessories: air stones, sponge filters, decorative ornaments, and undergravel filters.
7. Maintenance
Regular maintenance ensures the longevity and optimal performance of your air pump:
- Cleaning: Periodically wipe the exterior of the pump with a dry cloth. Do not use harsh chemicals or immerse the pump in water.
- Air Stone Cleaning/Replacement: Air stones can become clogged over time, reducing airflow. Clean them regularly by scrubbing or soaking in a mild bleach solution (rinse thoroughly before re-use). Replace air stones when they no longer produce fine bubbles evenly.
- Air Tube Inspection: Check air tubes for kinks, cracks, or blockages. Replace damaged tubing to maintain efficient airflow.
- Check Valve Functionality: Ensure check valves are clean and functioning correctly to prevent back-siphoning.
8. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| No air output or weak airflow |
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| Excessive noise/vibration |
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| Water back-siphoning into pump |
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Image: An exploded view of the hygger air pump showing dual piston cups for airflow, a thickening ABS shell for noise isolation, and four soft rubber feet to dampen vibration, contributing to low noise operation.
9. Warranty and Support
For warranty information or technical support, please refer to the contact details provided with your product packaging or visit the official hygger website. You can also visit the hygger Store on Amazon for more products and information.





