SLAM and Ph

[kdiamond]

I am on the downhill side of my first SLAM. At what point do I start adjusting the pH. Will high FC levels give a false pH reading?

 

[duraleigh]

From the SLAM article in Pool School...

The PH test isn't reliable during SLAMing so make sure to take care of this before you start.

It will be reliable again when your FC drifts below 10ppm so complete the SLAM and let FC drift down to maintenance level, then test and adjust (if necessary) pH.

 

[kdiamond]

Thanks. I saw that in the Pool School but did not know how low FC had to be. If my FC/CYA ratio calls for FC to be between 7-12 due to high CYA level (90) should I keep FC below 10 so pH will be accurate? I do plan to drain in a few months to get CYA down.
.

 

[duraleigh]

Simply check your pH when you know your FC will be below 10. FC should be tested just about daily when you first start. pH is fine testing every 3 days or so and will get longer apart as you learn the rhythm of your pool.

 

[kdiamond]

Thanks Dave.