It can take up to a week for the CYA to show on the test. Just assume you are at your target until then.
If the sock is sitting in the skimmer, you need to keep the pump running until it's all dissolved. Otherwise, it gets too acidic inside the skimmer. Even after the sock is empty, it may not be completely dissolved and reactive, so you don't test CYA again until it's been in there a week. You're just wasting reagents testing it too soon.And run pump continuously correct?
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Yep I see it on pool school. Will add and run. So after 24 hrs should I test again?