CYA danger?


Bronze Supporter
Jun 26, 2019
Longview Texas
Pool Size
Salt Water Generator
SWG Type
Pentair Intellichlor IC-40
The CDC is now recommending that public pools reduce CYA.

"the industry is starting to change about CYA. Some areas are already banning its use. Here’s an interesting article

I also noticed CYA is a lot more costly this year. 🤷🏼‍♀️

Before I fight mine up, I wanted more info (yes I've seen the old charts here)
Anyone else concerned about its safety?


Mod Squad
TFP Expert
LifeTime Supporter
Jul 7, 2014
Bedford, TX

Do you drive a car, fly in a plane, ride a bike, take a bath, walk up stairs, cross any roads? If so, you are much more likely to be killed or injured by those actions than the tiny amount of CYA in your pool... Sigh!!

They are talking about public pools where there is a huge risk of things happening that you really don't want in your pool. They are not worried about algae, but spreading disease. To counter this, they want the chlorine to be as fast acting as possible, which means a lower CYA.. It is not that CYA is bad for you..

If you check, you will also see that the article is by Ordenda.. They sell all kinds of "magic" in a bottle, none of which is recommended by TFP..

And finally, Richard A. Falk, the expert that they quote in the article, is the one that started what is now TFP, and the whole idea of higher CYA for residential pools.


Jim R.


TFP Expert
Platinum Supporter
May 23, 2015
Tucson, AZ
Pool Size
Salt Water Generator
SWG Type
Pentair Intellichlor IC-60
From the posted article -

A new way of thinking​

In our opinion at Orenda, the cyanuric acid conversation offers our industry a new way of thinking. It also offers pool owners who have been struggling with algae and other problems another reason to switch to a non-stabilized chlorine.

Welcome to the party Orenda … TFP has been teaching your “new way of thinking” since roughly 2007 and, before that, Ben Powell at the Pool Forum and Pool Solutions Inc (which ran an old email listserv) was talking about this since the late 1990’s … 🤦‍♂️

Good lord, these people act like this information is some kind of new revelation. And Orenda, while not the worst actor in the bunch, tries to make themselves look like they discovered all this science.

Orenda also has a financial motive here because they push their “pool care philosophy” that is basically a rip-off of TFP and then target their chemical sales to customers using their “amazing new science” … they’ve basically plagiarized all the work done by the Pool Forum and TFP. It’s like taking someone else’s research work and fraudulently presenting it as your own.


TFP Expert
LifeTime Supporter
Jun 12, 2009
NW Ohio
Anyone else concerned about its safety?
The issue is not the CYA but the effect of CYA. Essentially they are limiting CYA because they refuse to increase the FC level recommendations to counter the effects of CYA. If they allow high CYA then they have to allow high FC or the water can become unsanitary. Since it'll be a cold day in Leslie's Pool Supply before they adopt something like the FC/CYA Chart, they have to limit CYA to where 1 ppm FC is still effective. That's a pretty low limit.

So no, zero concerns about the safety. Just have to read between the lines to see that this isn't about CYA, it's about the failure to compensate for what CYA does. As Matt said, what TFP teaches is based on methods used for over 20 years now. Don't hold your breath on the industry catching up any time soon.
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