I've got an 24,000 gal vinyl pool.
My Ph is currently at 6.8. So I went to the pool calculator at: http://www.poolcalculator.com/
The grid up top tells me that with a 24,000 gallon pool, to go from 6.8 to 7.5, I need to add 280 oz (by weight, 269 oz by volume) of borax.
But then under the grid it tells me that if I add 220 oz of borax it will raise Ph by 1. According to the above though, nearly 1.5 times that will only raise it by 0.7.
Am I using the pool calc wrong or am I misinterpreting it or is there a bug?
What is correct though? How many oz (by weight) of 20 mule team borax would I add to a 24,000 gallon pool to raise the Ph from 6.8 to 7.5? (assuming other levels are good)