I feel your pain, more that you know.
As for this in your logs: Wondering if my bleach is weak
Do your addition and test after 20 minutes...Note the starting FC and after add FC. Note what your target was. If they don't match, your bleach is weak or your pool is bigger. If you note these values, I will help you change your Pool Math setup so your adds match your expectations.
As to the length of time, they are all different. You are constrained by your work. Adding every 2 hours really makes a difference with the SLAM time. Not a condemnation of what you are doing, we all do what we can. Just letting you know that is extending the time for the Slam.
Finally, I'm confused by your logs. Last night you tested 19. Then you made an addition and didn't test again until the morning. You should make your addition, test 30 minutes after and that is your starting OCLT value. If you are just using the Target FC as your start (with your final add), this can introduce errors in the OCLT. You never know if you actually got to your target FC.
Let's do this tonight. Note your target FC. Note the start FC with last add. Add. Wait 30 minutes and test FC again. Post those three numbers tonight (PoolMath for Start and End. Make note of target), that will get us started on the pool math adjustments. Go to bed.
Test FC in the morning before the sun hits the pool, note that. We will see where we get. I didn't look back to find your target slam FC. If your target was 20 and your add didn't hit target, you may have added to 19.5 and actually passed. DON'T GET EXCITED YET!!! LOL Let's do OCLT carefully tonight and see what happens.
Overnight Chlorine Loss Test Reading up again would not hurt!!!
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