PH is high and zero FC/CYA

[Johnson TX]

Hello,
I am having issues with my pool after replacing the liner. Due to some hard plumbing leaks I have not been able to clean the pool bc we had to drain some water for repairs. The water is now green and has been for 2 wks. I finally got things repaired and I tested the water. I have not added stabalizer or chlorine yet so those are zero. TA is 125 and my PH is a dark magenta/violet color. I am not sure if the PH spike could be from algae or if I need to use muriatic acid. Any advise would be very helpful. Thank you!

 

[Texas Splash]

It's time to use your TF-Series test kit (or Taylor K-2006C) to perform the SLAM Process. Lower the pH to about 7.2 and add enough stabilizer for a CYA goal of 30. Then increase (and maintain) the FC of "12" with liquid chlorine until you pass all 3 SLAM criteria.

Good luck!

 

[Texas Splash]

FYI in case you need it.

Adding CYA:
To increase CYA via granular stabilizer, place the required amount as calculated by the Poolmath calculator into a white sock and place in the poolside skimmer basket. For those concerned about suction flow to the pump, suspending the sock near a return jet or from a floating device will also suffice. Best never to allow undissolved granules to rest directly against the pool surface. After soaking for about 20-30 minutes, squeeze the sock often to help it dissipate. Once dissolved, consider your CYA adjusted to that programmed (target) level. CYA test readings should show a rise in 24-48 hours, however some pools may experience a longer delay to fully register. Best to confirm final CYA in about 5-7 days before adding any more stabilizer/conditioner.

 

[Johnson TX]

Thank you for the quick reply. Can I add the muriatic acid and stabalizer at the same time? I have a liquid stabalizer so it should increase the cya rather quickly. Also since the PH color is so dark, I have no idea what my starting number is bc it doesn't register on my Taylor k2006 kit. Should I assume the PH is 10?

 

[Donldson]

Should I assume the PH is 10?

No, if your pH is off the chart then treat it like the highest number on your tester. Dose from there to 7.2, let it circulate for at least a half hour and then retest and dose accordingly. Repeat as often as needed. It's too easy to overshoot pH adjustments (pool calculators like PoolMath do very poorly calculating large pH adjustments) and well worth taking the extra time to avoid that.

 

[Johnson TX]

Thank you for the very helpful information! Much appreciated.