How to add Borax

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Planning to add Borax to my non-SWG 9000 gal plaster pool as ph rises. I hope the following is correct. 540 oz or 7.10 Boxes of 76 oz 20 Mules team and 9 quarts of acid. Do these numbers look good to get the pool to 50 ppm.

Plan is to add one box a day through the skimmer then add 41 oz of muriatic acid, per day, to pool to neutralize alkalinity increase. Questions, how many cups of borax can be added at one time to the skimmer; and how long should one wait before adding more? How much muriatic acid should be added at any one time and how often through the day. Or can I put in the entire amount at one time, 540 oz borax and 9 quarts acid letting the pool cleaner run for 48 hours?

Final question, how much will the TDS rise?

Looking forward to your replies.


Aloha