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Read How to Shock You Pool. Got it. And use the pool calculator to determine how much chlorine to use for each treatment? Is there a ballpark idea how many bottles that might require?

Still trying to get my water balanced, specifically proper chlorine levels. To review, started with a moderately green pool, which I shocked twice with dichlor, 4 lbs each time. Also brushed, vacuumed and backwashed each time. After studying the articles Frustrated Pool Mom suggested, I quickly...

Thanks for double checking. Plan to test with a reliable DPT kit and make the adjustments. You've been a big help.

Tried using the pool calculator, inputting CYA=40, current FC=0.5ppm and shock level of 15ppm of FC, and came up with 601 oz 6% bleach, not 301 oz. as NPG17 came up with. Can you reconfirm these results?

Thank you all for your input. I used a DPT test kit all last year but some reagents dried up over the winter so a new test kit is the first step. Like all of you, I distrust the pool stores. Still have questions on how to interpret the pool calculators. Hopefully I'll get more useful responses...

Topic Split off by Moderator. Hope I'm in the right place for this question. In case my profile doesn't appear, I have a 20,000 gal. vinyl lined in ground pool using a sand filter. Attached fiberglass spa. Sani-King chlorinator using 3" tri-chlor tabs. Opened the pool this last Saturday using...