The Weald Aquatics Blog - How to clean a pond UV light filter - another blog post from Weald Aquatics | Aquarium & Pond Fish Shop in Kent

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How to clean a pond UV light filter

Blog post written by Gary | 03 June 2014 | Category: Pond maintenance
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Many customers find that even when they have a UV light filter fitted to their pond filter system the pond water remains or still goes green with algae.

If the UV light filter is the correct size for the pond and is working normally, then either the UV lamp needs replacing and/or the quartz glass has become dirty, reducing the amount of UV radiation reaching the algae and allowing the algae to multiply very quickly.

The UV lamp should be replaced every year ideally in the spring, giving full radiation output throughout the spring, summer and autumn when the sun is at its strongest.

When changing the lamp it is best to inspect the quartz sleeve for a buildup of hard water deposits and dirt. This should be cleaned from the quartz glass carefully as the quartz glass sleeve is very fragile.

We have taken a series of photos to show how a TMC UV filter is dismantled ready for a lamp change and glass clean.

 

Switch off power to UV unit and undo screws to remove green cover allowing access to light unit.
Switch off power to UV unit and undo screws to remove green cover allowing access to light unit.

 

Lift the light unit out of UV holder.
Lift the light unit out of UV holder.
Disconnect lamp leads from ends of UV lamp.
Disconnect lamp leads from ends of UV lamp.

 

Remove UV lamp from inside light unit.
Remove UV lamp from inside light unit.
Remove UV lamp from inside light unit.

 

SUnscrew nut fittings from each end of light unit, remove the two O rings and then remove quartz glass. Carefully clean the quartz glass and re-assemble into the light unit, fit and connect new UV lamp and refit cover.
Unscrew nut fittings from each end of light unit, remove the two O rings and then remove quartz glass. Carefully clean the quartz glass and re-assemble into the light unit, fit and connect new UV lamp and refit cover.
Unscrew nut fittings from each end of light unit, remove the two O rings and then remove quartz glass. Carefully clean the quartz glass and re-assemble into the light unit, fit and connect new UV lamp and refit cover.