Understanding Pool Hydraulics, Flocculation and Filtration


If you’re investing in a luxury, indoor pool, it’s important that your pool water is of a high quality and that bacteria is eliminated.  Luxury Pool Sauna Spa achieve this through world-leading filtration systems from Bayrol and Dryden Aqua.

Here’s the science behind the Bayrol and Dryden Aqua filtration systems that Luxury Pool Sauna Spa use to guarantee drinking water quality water for your luxury indoor pool.

Pool Hydraulics

Pool hydraulics improve your water circulation, which in turn improves your pool filtration and, as a result, the quality of your indoor swimming pool water.

Your turnover of pool water should be within around 4-6 hours, and the water should be turned over approximately three times a day.  Multiple turnovers are necessary because your pool water won’t all be filtered in one cycle.

During the first turnover, 40% of your pool water should be filtered.  By the second, 80% should be filtered.  95% of the water should have been filtered by the third turnover, and 99% by the fourth.

There must be enough inlet returns to ensure that the entire pool is refreshed with filtered water.  If the hydraulics of the pool are incorrect, the water cleanliness won’t improve.

Key term

Turnover of pool water – The amount of time needed for all water to pass through the pool filtration system.

Flocculation and Filtration

Key Terms

Flocculation – A chemical process in which colloids come out of suspension in the form of flakes.

AFM – Atomic Force Microscopy: high-resolution scanning.

To achieve the finest pool filtration performance, Luxury Pool Sauna Spa use bio-resistant filter media AFM, which is officially recognised by international bodies as the world-leading water filter media.

AFM media is supported by a dedicated flocculation and coagulation process using APF and ZPM.

Oxidation and pH control

Luxury Pool Sauna Spa disinfect pool water using an oxidation process that releases free radicals.  We use miniscule quantities of chlorine for residual disinfection.  There will be less chlorine in your swimming pool than there is in your drinking water.

If you would like more information about how Luxury Pool Sauna Spa can implement water management and pool filtration systems to maintain perfect pool water for you, sign up for a free pool consultation.

About Luxury Pool Sauna Spa

Luxury Pool Sauna Spa are specialist designers and builders of swimming pools and wellness suites for your homes, hotel, day spa or yacht. We combine our extensive knowledge and wealth of experience with your vision for your wellness space or swimming pool. By doing this we help you bring new life into your home, hotel or day spa through the creation of luxury facilities that allow you and your guests to grow and thrive. 

Swimming pool design and creating luxury wellness spaces is our passion. We specialise in the designing and building of bespoke products such as indoor pools or outdoor pools, basement and infinity swimming pools  

Luxury Pool Sauna Spa are exclusive UK partners of wellness experts Starpool. Together we work to bring our clients the latest in innovative designs and technology for wellness facilities such as saunas, steam rooms and spa pools and a host of other luxury wellness facilities that will liven up your space.

Through close consultation with you through the project, we ensure that our designs become one with the surrounding environments. This gives a sleek atmosphere to your pool or spa room. 

For more information contact us at:

0333 939 8009


54 Clarendon Road


WD17 1DU

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