What is your FC level? If it is above 10, you are probably getting a false high reading. Also, the typical drop based test does really measure above 8.2, so it is possible you are very high. My ph usually changes/stabilizes ~1 hour after adding the MA.
Results should be evident in one hour. Add 1 quart more in that pool to reduce pH from 8.2 down to 7.4 and retest in an hour or so....pump running. I assume your acid is 31.45%
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