1. Proteam’s dosage chart for their Supreme product (99.5% Sodium tetraborate pentahydrate)
shows 3.35 Lbs per 1000 gal for 50 ppm borates increase, which means 10.7 Oz per 10 ppm.
The dosage suggested in this forum for Borax (Sodium tetraborate decahydrate) is 12 Oz
per 10 ppm per 1000 gal.
Based on the ratio of the molecular weights of the two products, and assuming that only the tetraborate is the active ingredient, if Proteam’s dosage chart is right, then Borax should be dosed at 14 Oz, not 12.
This is about 17% more than suggested. Can anyone comment?
2. I wonder what “ppm borates” exactly means.
If 12 Oz Borax are needed to raise 1000 gal water by 10 ppm of borates, the resulting solution is about
100 ppm of Borax. Since the molecular weight of "Borax" is 382, it means that this measured "borates" species should have a molecular weight of about 38, in order to have a 10 ppm of measured "borates" in a 100 ppm Borax solution. 38 corresponds to B2O but I can't see a species in borates chemistry that corresponds to this stoichiometry. Any ideas?
Obviously all the above is moot if I made a Boo Boo in the calculations.