I have like 4-5 different ph papers rolls of hydrion orange 0 to 14 and the 3 and 4 banded strips ya see, along with red and blue litmus, but the dige is prefered due to the decimal. Hence 12.02-03-04-(add lil base) 12.20-22-23-24-25... etc.
As long as the end result keeps you awake, its ALL good.