Help, shocking and PH is through the roof!

To make a very long story short, pool went from fine with good numbers to a green monster overnight. :cry: 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

TFP Expert
LifeTime Supporter
Jan 6, 2010
20,397
San Dimas, CA (LA County)
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

TFP Expert
LifeTime Supporter
May 30, 2007
10,045
South Carolina
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.
 
Thread starter Other Threads of Interest Forum Replies Date
A Under Construction 1
H Pumps, Filters, and Plumbing 1
L Everything Else 0

Other Threads of Interest