UVC In-Line Clarifier Fluval, 16×14×6.5 cm, 3 W, for up to 400 L flow

Fluval UVC In-Line Clarifier is a compact ultraviolet clarifier measuring 16×14×6.5 cm with a 3 W UVC lamp, designed to be installed directly in external aquarium plumbing. The unit treats up to 400 L of circulating water and targets free-floating algae, bacteria and common waterborne pathogens. Its inline design enables sterilization of water without altering the aquarium layout and is compatible with standard tubing connections for continuous clarification.

Advantages

The clarifier delivers continuous ultraviolet treatment in a small, easy-to-integrate housing that fits typical external filter lines. With a low-power 3 W UVC lamp it provides effective reduction of green water and microbial load while remaining energy-efficient. The inline configuration keeps the unit out of display space and simplifies installation and maintenance compared with standalone sterilizers. The compact dimensions make it suitable where space is limited, and its construction is intended for regular aquarium and small pond use.

Suitable for

• Freshwater and marine hobby aquariums with external plumbing
• Small garden ponds and circulating water systems
• Situations requiring reduction of free-floating algae (green water)
• Supportive control of bacteria and waterborne pathogens in recirculating systems

Key specifications

• Body dimensions: 16 × 14 × 6.5 cm
• UVC lamp power: 3 W
• Designed treatment capacity: up to 400 litres of circulating water
• Inline installation for connection to external plumbing/tubing
• Intended application: continuous water clarification and sterilization

How to use

Install the clarifier into the external return or filter plumbing according to the flow direction marked on the unit, ensuring secure tubing connections and leak-free fittings. Operate the UVC lamp while water circulates through the clarifier; maintain recommended flow rates for best clarification performance and avoid running the lamp dry. Periodically check the lamp and quartz sleeve (if applicable) and replace the UVC bulb at the manufacturer’s suggested interval to maintain effective output.

Usage recommendations

Use the Fluval UVC In-Line Clarifier in systems where mechanical and biological filtration remain active; UVC treatment reduces free-floating algae and microorganisms but does not replace routine filtration maintenance or water quality control. For optimal results, match the flow rate to the unit’s recommended range, keep tubing clean, and replace the UVC lamp on schedule.