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Pool Filter Turn-Over Rate

Turnover Rate - the time it takes in hours to circulate the entire pool's gallonage or volume. Not necessarily the pool's actual water.  Let us explain...

Circulation is more than filter or pump turnover; its removing dead spots - you know those areas where algae always seems to grow or where dirt & debris always seems to accumulate. The better the water is circulating, the better the filtration, the cleaner the pool.  In fact it typically takes more than FOUR turnovers to get all of the water completely filtered.

The following chart shows how much of your pool water is typically filtered in a normal filter turnover.  Turnovers are normally determined by "how much" water can go through the filter system - not what is actually filtered.

% of Pool Water that is Filtered per Turnover


After 1 Turnover

After 2 Turnovers

After 3 Turnovers

After 4 Turnovers

Why does it take so much time & effort?  Mainly, it's due to dead spots.  Dead spots are those areas of the pool where the water may not completely move or circulate.  Dead spots are the "birthing grounds" for algae & biofilms resulting in green or cloudy water. These are the most common areas of would be dead spots:

  • the bottom half of the pool especially in pools without main or bottom drains
  • corners of rectangular pools
  • the "exact" center of almost all round & most oval pools - especially aboveground pools
  • behind ladders and / or stairs
  • areas directly adjacent to pool skimmers & return fittings
  • a combination of all of the above

Click here for further information about pool circulation & how to avoid dead spots.

If you still need help, here's how to reach us:

Telephone (during store hours): Stratford  203-377-0100
FAX: (24 hrs) 203-375-7787
Email: techhelp@parpool-spa.com 

 

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