AllPondSolutions AUTO-PFC-5000 Mode D'emploi page 16

My Pond Water Is Still Dirty
If the water in your pond is still not clear after installing your filter, this might be
due to the following:
The filter has not been installed for long enough - it can take a few weeks to
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see the full effects of the biological filtration.
Your filter sponges are dirty - consult the maintenance section above on
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routine and deep clean instructions for your filter sponges.
The quartz sleeve is dirty - consult the maintenance section above on how to
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clean your quartz sleeve.
Your pond is heavily populated - ensure that your pond is not overcrowded.
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Your pond water is very dirty - you may need to remove any leaves from your
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pond, carry out a water change, or remove widespread algae with the use of
an additional water treatment.
Insufficient pump size - ensure that your water pump is the correct size for
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your pond.
If none of the above resolves your issue, or you require spare parts for your
filter, please contact the supplier of your unit.