I was looking back at old posts regarding the use of borax to help stabilize ph and other beneficial qualities. What I don't understand is the calculation to determine how to arrive at 30-50ppm of borax in the water. My understanding is that 1ppm is the equivalent of 1:1,000,000. In practical use, this means that one pound of product (borax for instance) added to one million pounds of water (120k gallons) equals one part per million. Wouldn't that mean that to bring the level of borax to 40ppm in a 14k gallon pool, which is the equivalent of approximately 116,667 lbs, that about 4.6 lbs of borax would be necessary? The prior forums indicate that about 9 to 10 times this amount is required to reach that same 40ppm. What gives?