I just opened my pool and tested with strips and it showed 0 CYA, so I added 4 pounds. About 2 hours later I took a water sample to Leslies. My counts were as follows:
Since then, I've added 360oz 8% Great Value bleach from wal-mart and 7 - 83% tablets to tablet feeder in the evening and got a .5 FC reading at noon the next day. Then I added 2lb 65% Cal-Hypo and waited 2 hours and still tested .5 FC. However, if I wait a minute when testing it shows around 2 FC and if I wait 5 minutes it's >5 FC. It almost turns orange after 15 minutes.
How long should I wait for comparing the color? Does the OTO test drops go bad?
Why would Leslies tell me to add 2 gallons of muratic acid 1qt every 4 hours when the pool calculator says adding 2 gallons of acid would have dropped my PH from 8.0 to 6.6? Also, my PH on the comparator looks lower than when I went to Leslie's and looks around 7.6 on the comparator so I probably won't even need to use the acid because the CYA is dropping it. I told the guy I had just added CYA two hours before getting the sample, so I think he should have known my PH should go down.