Cloudy or green aquarium water? With the XIIW UVC clarifier, your water will be clear again

Green, brown, or milky cloudy water in the aquarium is not only unattractive, but can also put stress on the biological balance in the tank. The XIIW 4-in-1 Aquarium UVC Clarifier combines a powerful submersible pump with an integrated UV-C lamp, filter function, aeration, and flow generation – for clear, stable, and healthy aquarium water.

The integrated 8W UV-C lamp with 254 nm helps effectively reduce suspended algae, bacteria, and odors caused by cloudy water. Depending on the amount of algae and the water condition, the water can become visibly clearer after 2–7 days.

Your benefits at a glance

• Effective UVC water clarification: Supports clear water with green, brown, or milky cloudiness.
• Strong 1200 L/H flow rate: Ideal for aquariums with a volume of approx. 180–420 liters.
• 8W UV-C lamp: Helps reduce suspended algae, bacteria, and unpleasant odors in the water.
• 4-in-1 function: UVC clarification, coarse pre-filtration, aeration, and flow in one device.
• Integrated timer: Flexible runtimes of 4H / 8H / 12H / 24H depending on water condition.
• Stable water balance: Supports a healthy ecological cycle in the aquarium.
• Fewer water changes: Helps keep water quality stable and clear for longer.
• Suitable for fresh and salt water: Ideal for green water, whitish cloudiness, or odor formation.

Typical areas of use

• Freshwater aquariums: For green water caused by suspended algae.
• Saltwater aquariums: For whitish milky water cloudiness.
• Ornamental fish tanks: To support clear and stable water quality.
• Aquariums with odor issues: Reduces unpleasant odors caused by bacteria.
• Tanks with oxygen needs: Aeration mode supports oxygen supply.
• Large aquariums: Suitable for tanks with approx. 180–420 liters.

Four functions for a healthy aquarium

The XIIW Aquarium UVC Clarifier offers multiple functions in one compact device. This saves you extra equipment in the aquarium while improving water circulation, oxygen supply, and water clarification at the same time.

• UVC clarification: Helps combat green and cloudy water caused by suspended algae and bacteria.
• Coarse pre-filtration: Supports the removal of visible dirt particles from the water.
• Aeration: Promotes oxygen supply in the aquarium.
• Flow generation: Ensures natural water movement and supports the water cycle.
• Rainforest river mode: Creates lively water movement for a natural aquarium experience.

Usage recommendation

If aquarium water turns green, brown, or milky cloudy, a water change is recommended first. After that, the UVC function can be activated. Depending on the water condition, the UVC lamp should run for about 4–8 hours per day. In many cases, the water becomes noticeably clearer within about 3 days.

After the water has cleared, it is recommended to use the UVC lamp regularly – for example on the first day after a water change or once a week, even without a water change. If green cloudiness and lack of oxygen are more severe, the aeration mode together with UVC 24H can be used.

Important note: UV-C light must not be directed at fish, plants, skin, or eyes. The device must be fully and correctly installed in the water and may only be operated according to the instructions. If fish behavior is unusual or signs of illness appear, a specialist retailer or veterinarian should also be consulted.

Installation & operation

• The submersible pump body must always be positioned below the waterline.
• Vertical installation: Minimum water level approx. 24 cm.
• Horizontal installation: Minimum water level approx. 9 cm.
• The UVC timer can be adjusted depending on water volume and water condition.
• Selectable operating time: 4H / 8H / 12H / 24H.
• For green cloudiness with lack of oxygen: perform a water change and activate aeration mode + UVC 24H.

Technical data

Frequently asked questions (FAQ)

Does the XIIW UVC clarifier help against green water?

Yes. Green water is often caused by suspended algae. The integrated UV-C lamp helps reduce these and makes the water clearer again.

How long should the UVC lamp stay on?

For acute water cloudiness, about 4–8 hours per day is recommended. For stronger green cloudiness, the 24H mode can also be used depending on the situation.

When will the aquarium water be clear again?

Depending on the amount of algae, tank volume, and water condition, visible improvement may occur after 2–7 days. In many cases, the water becomes clearer after about 3 days.

Can the pump be used continuously?

The pump can be used regularly for water circulation, aeration, and filter support. The UVC function should be controlled via the timer depending on the water condition.

What aquarium size is the device suitable for?

The XIIW UVC clarifier is suitable for aquariums with a volume of approx. 180–420 liters.

Is the device suitable for freshwater and saltwater?

Yes, the device is suitable for both freshwater aquariums and saltwater aquariums.

Conclusion

The XIIW 4-in-1 Aquarium UVC Clarifier with 1200 L/H is the ideal solution for anyone who wants to effectively reduce green, cloudy, or unpleasantly smelling aquarium water. With UVC clarification, coarse filtration, aeration, and flow generation, it supports a clear, stable, and healthy aquarium environment – without any additional devices.

Order now and give your aquarium clear, fresh water again!