Not sure what "safety kit" means, but PH is a color change result test. So any of them are ok with usJust got the kit, I am looking through it and reading the instructions. Is the only way to test pH with the little blue safety kit?
FC has 2 ways to test, the OTO (yellow drops) test, that simply indicates chlorine is present. The exact amount is measured with FAS-DPD (white powder that turns pink when placed in chlorinated water)