Help, shocking and PH is through the roof!

[Mrs_Ingersoll444]

To make a very long story short, pool went from fine with good numbers to a green monster overnight. Been battling green since Monday and not making much progress. Keeping FC around 20-22 with 0% loss overnight.

Numbers Tuesday evening were:

FC-22
CC-0
PH-7.5
CYA-50

Wed early AM:

FC-22
CC-0
PH-7.5

Added 128 oz 12.5% bleach Wed night after work to hit it even harder and numbers are:

FC-27
CC-0
PH->8.2

What happend with the PH? I was at 7.2 on Monday and now above 8.2 I would think all the chlorine would bleach out the test and make the PH test read lower?

Do I leave the PH alone since I'm shocking and it will settle back down or do I need to hit that too? Urgh!

Thanks for the help!

Michele

 

[Richard320]

Ignore it.

Bleach is carried in a very alkaline solution. It will equalize sort of when the breakdown of the NaOCl is complete. When you're done shocking, the water's clear, and the FC is down to a more normal level, you can resume worrying about pH. In the meantime, you're just wasting reagent and worrying needlessly.

 

[Butterfly]

Don't test the pH while the FC is above 10 as it can read a false high.

When your FC drops below 10, retest pH, adjust (if necessary) and then resume shocking.

 

[Mrs_Ingersoll444]

Thanks for the help! I will stop testing PH and just battle the algae.

I've got my fingers crossed for it changing to milky white today! :-D

Michele