This also gives chlorine good disinfecting power. Ideally, it is recommended to keep your pH around 7.4, the same as the pH in the human eye. The pH scale ranges from 0-14, where 7 is considered neutral. At that point, it doesn’t matter how much FC is available because it’s probably not doing the job. You can see that without CYA in your pool and high pH levels, your chlorine becomes ineffective extremely fast. To the left is a chart showing the effectiveness of chlorine in relation to pH values when your CYA is zero. Higher levels of pH threaten the disinfecting power of chlorine. In relation to chlorine, the pH of your pool water determines how effective your chlorine is. Now that we know how CYA affects chlorine, let’s add pH to the mix. Below is a chart we pulled from TroublefreePool.Com showing the recommended relation for outdoor residential pools. As your CYA increases, higher levels of FC are needed in order to prevent algal growth.
This ratio determines the active chlorine levels needed to prevent algal growth, not just FC alone.įor example, if your pool started with 30 ppm of CYA, then 7.5% of 30 ppm is 2.25pm of FC. It is recommended that your FC is 7.5% of your CYA levels. Given a minimum FC concentration, the FC/CYA ratio determines algal growth rates. It’s been proven that by keeping the correct CYA/FC ratio, you can control algae growth under all conditions.
It is essential to maintain the FC/CYA ratio to kill algae and bacteria effectively. So, if you live in a state like we do (Florida), it’s something you have to consider. In a sense, CYA acts as a reservoir for FC. It has been stated that 90% of unprotected chlorine is lost within two hours by direct exposure to sunlight. Remember, FC not only gets depleted through interacting with germs and bacteria but is also consumed by sunlight. You might have read somewhere that the amount of chlorine you need to add to your pool depends on your current CYA levels. And you won’t be able to understand the recommended levels until you understand the relationship chlorine has with cyanuric acid (CYA) and pH. Though the relationship between chlorine and cyanuric acid is not a new revelation to the pool industry, it is very rare that you come across pool technicians who truly understand the effect one has on the other.īefore you can recognize when you have too much chlorine in your pool, or not enough, you have to know the recommended levels your pool needs. The Chlorine and Cyanuric Acid Relationship
Your TC should not be less than the FC level.
DOES BLUEX CHOLOROX HAVE CYA PLUS
Total chlorine (TC) is simply your FC plus your CC. The CC levels are chlorine that no longer has disinfecting power. Chloramines are what we refer to as combined chlorine (CC).
Once chlorine interacts with compounds such as urine, sweat, bacteria, etc they form chloramines. FC is the part of the chlorinated water that hasn’t interacted with contaminants, yet.
DOES BLUEX CHOLOROX HAVE CYA FREE
Is there such a thing as having too much chlorine? At what point does your pool water become unsafe to swim in due to over-chlorination? How much chlorine do I add to my pool? Is it also true that chlorine is a carcinogen? These questions have multi-faceted answers, so let’s dive right in.įree Chlorine, Combined Chlorine, and Total Chlorineįirst, let’s make sure you understand the differences between free chlorine, combined chlorine, and total chlorine and how you measure each.įree chlorine (FC) shows the level of disinfecting chlorine available to sanitize your pool. Still, there are a ton of questions about chlorine that pool owners still grapple with. In fact, chlorine kills bacteria with a 99.9% reduction in less than a minute. We all know that chlorine is necessary to keep our pool sanitized, but do you know the relationship it has with cyanuric acid? Chlorine and cyanuric acid help fight germs, bacteria, and other viruses that may enter our pool at any given time.
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