I am working on adding Proteam Supreme calculations to my Pool Calculator. However, Chem Geek's spreadsheet and Proteams's dosage chart disagree by nearly 20%. To raise borates by 50 ppm in 50,000 gallons, Proteam says to use 168 lbs of their product (which is 99.5+% sodium tetraborate pentahydrate). Chem Geek's spreadsheet gives 2249 oz, or 140.56 lbs, a difference of 19.5%.
Proteam and Chem Geek agree quite closely on the ratio of Supreme to muriatic acid required to maintain PH.
I am wondering if perhaps Proteam has raised the numbers in their dosage chart to try and take account of splash out, or something like that.