I am planning to add borates to about 50ppm to help with my acid usage. According to the pool calc. I need about 140 lbs of borax and 70 lbs of acid!! Can I do this in intervals through the span of about a month or 2 or should I do it all at once? If I do it in intervals is there a certain time that I need to wait in between additions to test and get an accurate number?