I wanted to add Borates to my pool but I didn't want to buy 17 boxes of Borax ($68.00) and 6 gallons of Muriatic Acid ($39.00).
So, for $85.00 (delivered), I bought 55 lbs of granular Boric Acid from Duda Energy.
You can buy varying quantities if you don't need 55 lbs. It was so very easy & now my pool is sparkley!!