Eyein Adjustable Air Pump 4W for 400L aquarium 🐠

This compact aquarium air pump from Eyein brings adjustable aeration to home tanks, improving oxygen circulation for fish and decorative air displays. Its low-power 4 W motor and dual outlets make it suitable for aquaria up to 400 L, offering quiet operation for living rooms and hobby spaces.

Key Points

This model includes a user dial to control the airflow from each outlet, which helps tune bubbles for different setups and species. The unit is sold with tubing, air stones and check valves so a basic installation is ready straight away, and the hook design allows horizontal placement or hanging to suit your cabinet or rim. For quieter setups, place the pump on a soft surface such as a towel as recommended by the manufacturer to reduce vibration noise. 🐟

Performance is modest but practical for many tanks. The pump delivers steady aeration with a maximum flow of 3 l/min and works at a working pressure of 18 kPa. Noise is kept low, reported at 20 - 40 dB according to the manufacturer, so it operates as a faint hum in most rooms. 💨

Technical Specifications

• Name: Eyein Adjustable Air Pump Aquarium
• Power: 4 W
• Maximum flow: 3 l/min
• Pressure: 18 kPa
• Recommended tank capacity: up to 400 L
• Noise level: 20 - 40 dB
• Included accessories: two silicone tubes, two air stones, two check valves, power adapter

Usage Recommendations

Connect the silicone tubing to the dual outlets and fit a check valve on each line if the pump will sit below water level. If you forgo the check valves, position the unit above the water line to prevent backflow. Adjust the knob to reduce or increase bubble output depending on whether you want gentle surface agitation for oxygen exchange or more visible bubble effects for aesthetics.

Consider mounting options carefully in planted tanks and small setups. Strong aeration can disturb lightweight plants or fry, so lower the airflow when necessary. The pump’s ABS casing and four rubber feet help dampen vibration and prolong stable running, but long-term continuous operation in very humid environments may benefit from occasional inspection.

Advantages

The dual outlet configuration allows shared aeration between two zones or the use of two air stones for more even oxygen distribution. Its compact footprint makes it simple to hide in small stands or behind decorative elements. The overall kit is convenient for beginners since most parts needed to start are included. Some users may prefer a higher-capacity model for very large or heavily stocked tanks, so consider the 400 L guideline when planning filtration and aeration systems.