Muratic Acid How Soon To Test After Adding

tnewton7

Well-known member
May 5, 2008
59
0
Louisville,KY
#1
How long should it take for a p.h. change to show up after adding muratic acid? I used the liquid type, added it to a couple gallons of water, and broadcast at deep end returns. I used 16ozs ,as I was only looking for a .3 reduction.
 

Rangeball

Well-known member
May 25, 2007
785
0
#2
I always wait overnight, as I want to make sure and not overshoot PH on the low end.

I suppose you could go by your calculated turnover time at a minimum, if you're in a hurry for some reason.
 

chem geek

LifeTime Supporter
TFP Expert
Mar 28, 2007
12,082
2
San Rafael, CA USA
#3
Depending on your pool's circulation, the pH change could be reflected in 20-30 minutes though I'd wait an hour to be sure. Most chemicals mix thoroughly in the pool rather quickly and the reactions in the chemical buffer system are very fast (in human terms). The only exception would be "thick" viscous products like PolyQuat 60. I've done tests in my pool that show fairly thorough mixing in 20 minutes when pouring chemicals over a return flow at the deep end, but I've got two floor drains and a skimmer opposite the return at the deep end and two additional returns in the shallow end. For above-ground pools that typically do not have a floor drain, the mixing will take a lot longer though you can speed things up by lightly brushing with a pole or otherwise stirring up the water.

Richard
 

dfiletti

LifeTime Supporter
Jun 12, 2008
76
0
50
Thornton, PA
#5
chem geek said:
Most chemicals mix thoroughly in the pool rather quickly and the reactions in the chemical buffer system are very fast (in human terms). The only exception would be "thick" viscous products like PolyQuat 60.
I guess another exception to the 'test it quickly after adding' rule is CL stabilizer/ CYA -this stuff takes up to a week to be testable -from what I've read here.

Dan