overall, not bad... at CYA 30, you should maintain your FC 3-6, but you said you added chlorine. Adding more CYA should be done cautiously- you don't want to much!
As far as the test turning blue- add 1 more drop, and see if color changes more; the endpoint is reached when 1 drop doesn't change the color anymore, and you don't count the last drop (the one that didn't change color any!)
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