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Reverse Osmosis Lowers CYA

Yes, it does! In fact, it does it exceptionally well.  Our Puripool Process can remove excess CYA (Cyanuric Acid) while the rest of the pool is processing and lowering calcium, salt, bacteria, viruses, phosphates, etc.  Many of our Service Providers (as well as ourselves) get called out to primarily lower CYA in areas where the concern over calcium removal is not the driving force.  We know of nothing that is capable of removing excess CYA as quickly or efficiently as a Reverse Osmosis pool filtration.

In an outdoor pool with no CYA, chlorine is consumed within the first 2 hours of sunlight hitting the pool.  CYA serves to protect the chlorine (sometimes called sunscreen for chlorine) and allow it to stick around longer.  However, too much CYA will bind over the chlorine and will not allow it out to work.  We often hear that “I can’t keep chlorine in my pool” when it really is present but unable to break through the grip of CYA. In the end, there is a direct relationship to the amount of CYA in a pool and the proper chlorine level.

It isn’t uncommon for us to pull up to swimming pools with CYA levels as high as 100, 200, or even 300 parts per million (ppm) or higher! When this happens it can be much more challenging to keep free chlorine working optimally in your swimming pool because the factor to establish the level of free chlorine needed to combat algae is the level of CYA x .075. So, if you had 150 ppm like the pool we just filtered it would take approximately 11.25 ppm (free chlorine) to keep your pool algae free and that can be challenging especially when the water is warm. That’s why the recommended levels of CYA in a chlorine pool are between 30 -50 ppm. Just last week we filtered a 15,000-gallon swimming pool because of high CYA and this is our Mobile Filtration Reverse Osmosis (RO) Puripool Process performed:

Initial Chemistry:

Calcium Hardness – 520 ppm

Total Dissolved Solids – 2442 ppm

Cyanuric Acid – 150 ppm

After filtering this swimming pool for 8 hours we were able to leave them with the following ending chemistry and they got to conserve 85% of the existing water in the swimming pool.

Calcium Hardness – 140 ppm

Total Dissolved Solids – 710 ppm

Cyanuric Acid – 35 ppm

If you’re ready to have that good feeling that you have just conserved a valuable and limited resource, then you need to call us. In addition to the fact that your waterline tile will no longer get that nasty buildup on it, and that you will use a fraction of the chemicals you did before the process to maintain your pool, you will get the experience of swimming in a soft water pool. Chances are you have never experienced that before and will never want to experience anything less from now on!

Take that first step, your pool and you will thank us 🙂