CYA lowering pH?

faigenistic

Well-known member
Jun 20, 2023
45
Charlotte, NC
I took readings of everything using my K-2005 test kit (excluding FC/TC/CC which i used the FAS/DPD test) yesterday at 1030AM and this is what I had:

pH: 7.5
FC: 7.5
TC: 7.5
CC: 0.0
TA: 80
CH: 210
CYA: 30
Salt: 3171 (using SWCG reading)

Per the math, I added about 4.5 lbs of CYA moment ago via pantyhose in front of the return to get my CYA up to around 80, and of course, it lowered my pH from 7.5 to 6.9 (it's an acid, duh...). I know it will rise over the next 24-48 hours as the CYA continues to disolve and be absorded, but my 4 year old son wants to swim in 2 hours - I assume this is still safe?
 
Do you have any aeration for your pool such as deck jets and the like? Aeration increases pH.
ive been running the pump on medium since i did it for the past 2+ hours. all i have is two main returns from the pump. i did go around with the pole and broom and aerate and also used myself a splash test dummy for 10 mins. i didn't bother me at all tbh, we plan on showering right after and wearing goggles.
 
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