Filling a small pool with iron well water

[newbiepool]

Test results today were pH 7.2, Chlorine 5, TA 220 (I added 17 drops and it was starting to turn red added more and it was mostly red when I got to 22 - I am new to testing so I'm just going by what the paper said to do). Should I add borax to lower the TA? How much?

[PoolDoc]

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+ Borax doesn't lower TA; it raises pH. Right now, you don't need to raise pH OR lower TA.

+ Filter, filter filter.

+ Don't let your chlorine get below 2 ppm.