Swimming Pool & Spa Construction & Maintenance/Silt removal from pool


Hi, I have an inground swimming pool of approx 45 meters cubed. It has been in service for about 4 years with no real problems but last winter a number of storms dropped a large amount of very fine silt which is now difficult. Vaccuming simply disturbs it. The 2 micron robot cleaner is run for 3 hours a day and does remove some but only small volumes with the remainder being dispersed into the water. The clarifiers I have tried do not seemed to have helped. I have a sand filter system with auto chlorination and pH adjustment. Any ideas on products or techniques for removing the silt?

Hi Andy,

Thanks for your question.

In your particular case & mainly because you do have a sand filter you should be able to simply vacuum that fine silt directly out of the pool using the "WASTE" setting on your filter's multiport valve (as found on almost all 6 or 7 position multiport valves).

Just in case your filter is not equipped with one of these valves, you could backwash the silt out.

Either way will cause a major loss of water so work quickly trying to disturb as little as possible.

Here's a link: http://www.parpools.com/Page/Help/Pool/How_to_vacuum_a_swimming_pool.html

I hope that helps.

Swimming Pool & Spa Construction & Maintenance

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Ron Parrs


Swimming Pool & Spa/Hot tub care. Water chemistry. Problem solving. Residential pools, vinyl liner a specialty. Limited knowledge of gunite or plaster pool construction. Familiar with almost all types of sanitizing systems whether chlorine, bromine, salt, low & non-chlorine chemical treatment, biguanide (Baquacil or Soft Swim), Nature2, etc. Experience treating bio films in pools and spas. Aqua finesse, PoolNaturally & SpaNaturally (using sphagnum moss to control pool & hot tub chemistry & bio-films).


Pool & spa care experience for over 37 years. Owner of Par Pool & Spa in Stratford, CT. Websites: www.parpools.com , www.spacareonline.com , www.pool-care.net , www.parpoolsblog.com

EzineArticles.com , websites mentioned above, Pool & Spa News

BS Accounting, University of Bridgeport, almost yearly participation in BioGuard Pool Schools, BioGuard University, Chem Plus Schools, Chem College attendance since 1981

Awards and Honors
Past President - Connecticut Spa & Pool Association, Past Board Member - Northeast Spa & Pool Association

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