Arcadia 8W UV Bulb - Green

For optimal performance, it is generally recommended to replace the UV bulb every 9-12 months, as UV output diminishes over time even if the bulb still illuminates.

This 8W bulb is compatible with UV sterilisers specifically designed to accommodate an 8-watt bulb. Always check your UV unit's specifications before purchasing a replacement.

This UV bulb is most effective against suspended green algae that cause 'green water'. It is less effective against string algae or algae that grows on surfaces, and it does not treat other water quality issues.

While the bulb may still light up, its UV output decreases over time. If you notice a recurrence of green water or reduced clarity despite consistent use, it is likely time to replace the bulb.

The 'Green' designation often refers to the colour of the product packaging or branding, and does not typically indicate the colour of the light emitted, which is usually in the UV spectrum.

You can gently wipe the exterior of the bulb with a clean, lint-free cloth if necessary, preferably after disconnecting power and allowing it to cool. Avoid touching the glass with bare fingers. The quartz sleeve around the bulb is more critical to clean regularly for light transmission.

Ensure the UV bulb is correctly seated and powered on. Check that the flow rate through the UV unit is suitable for the bulb's wattage (consult your UV unit's manual). The quartz sleeve may need cleaning, or the bulb may need replacement if it's very old.

Verify that the unit is properly plugged in and receiving power. Check the bulb for any visible damage and ensure it is correctly installed. If the issue persists, the ballast or internal components of the UV unit may be faulty.

This could indicate a loose connection or a failing ballast within the UV unit. Ensure all connections are secure and consider professional inspection of the UV unit if the problem continues.