I put in 6 boxes of 20 mule team borax in 12k pool. The pool calculator said I should put 9.3 four lb. Boxes. I tested with the strips after adding 3 boxes each time and the 2nd time around it looked like the strip indicated 50 ppm. The color looks about right, but the shade is not as intense as the color on the bottle.
What are the expert's opinions on what I should do?