Re: pH won't go down

Originally Posted by
myLABSpool
If pH keeps inching up, I will follow your advice for lowering the TA to 70. Here I was real proud of myself for nailing the TA right in the middle of the recommended range at 100.
Actually, the recommended range for TA using unstabilized chlorine sources such as bleach (which are net pH neutral or close to it on use) is 80 to 100 ppm and below 80 is needed in cases where pH tends to rise fast (SWCG, fountains, negative edge pools for example). For stabilized chlorine, organic bromine, and MPS a higher TA of 100 to 120 is recommended since these are acidic and the higher TA will ofset their acidic effect by causing pH to rise.
Retired pool store and commercial pool maintenance guy.
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