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JamesI
JamesI, Electrician
Category: Pool and Spa
Satisfied Customers: 1211
Experience:  James has 7 years expereince managing and support pool plant equipmant for swimming pools.
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We have a polyandry pt900 filter in our pool. Since a while

Resolved Question:

We have a polyandry pt900 filter in our pool. Since a while when I use the vacuum brush (connected to one of the skimmers) to clean the bottom of the pool, the water coming out of the returns on the wall is not clear, cloudy green water. I have used backwash and extensive rinse and the problem remains the same. What could the problem be?
Submitted: 9 months ago.
Category: Pool and Spa
Customer: replied 9 months ago.
Meant a Poltank pt900 filter
Expert:  JamesI replied 9 months ago.

There are a number of reasons for this, firstly I would check the multi valve on the sand filter is set to filter and no bypass.

I would then try and add a enhancer\clarifier to the water leave it running for 24 hours then do a long back wash and see if the water clarity improves, this can be purchased from any pool store or online such as the one here.

If this doesnt improve the water to the quality you require I would look to shock the pool to around 10ppm, leave that for 12 hours and then bring it back to a safe bathing level.

After shocking the pool if the water clarity is still not of a high standard, I would consider replacing the sand in the PT900 filter, this should be done every couple of years, and if it hasnt been done recently its worth doing.

JamesI, Electrician
Category: Pool and Spa
Satisfied Customers: 1211
Experience: James has 7 years expereince managing and support pool plant equipmant for swimming pools.
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