How to clean and change a pressurised pond UV light filter
Blog post written by Gary | 04 September 2014 | Category: Pond maintenance
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, then normally if the unit is working either the UV lamp needs replacing and/or the quartz glass has become dirty reducing the amount of UV radiation reaching the algae 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 build-up of hard water deposits and dirt. This should be cleaned from the quartz glass carefully as the glass sleeve is very fragile.
We have taken a series of photos to show how a Bermuda pressurised UV filter is dismantled ready for a lamp change. To change the UV lamp in a similar filter system will normally follow the same rules.
Changing a lamp
Turn both pump and UV filter off at the mains switch before opening the filter.
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