Green Water
•
Perform a settlement test to ensure that the is no sediment suspended in the water – if there is
follow the brown/cloudy water troubleshooting guide.
TROUBLESHOOTING
PERFORMING A SETTLEMENT TEST:
Take a glass of water from the pond and allow to settle for a few hours. If when the glass
is stirred a small layer of settled waste can be seen at the base. This indicates that you
have brown/cloudy water and that, if you have a UVC, it is working correctly. If there is no
settlement it indicates that you have green water and that the UVC is not working correctly.
•
At dusk check the UVC light is illuminated using the viewing window on the UVC electronics cap.
UVC illumination
viewing window
•
Check the age of the UVC bulb. As UVC bulbs age the light output deteriorates, if the bulb
is over 6 months old, the output may not be strong enough to have an effect on the algae
causing green water – change the bulb.
•
The UVC may be working effectively, but the filter media is too clean so is unable to remove
the fine coagulated waste – treat the pond with a clearing product, such as Blagdon Clear
Pond, this will clump the particles together to make them larger, and therefore easier to
remove from the water passing through the filter.
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