Blagdon 7000 Manual - Halaman 17

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Green Water

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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.

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.

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At dusk check the UVC light is illuminated using the viewing window on the UVC electronics cap.

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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.

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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.

TROUBLESHOOTING

UVC illumination

viewing window