While you are adjusting things and learning how to use your new kit, use it daily for a few days. Then, you can switch to using your OTO for daily testing and use the good kit once a week or so. I'd check the CYA weekly while you are adding dichlor. There is only enough reagent for 5 or 6 tests I believe. One thing to remember that may help you judge how much CYA you are adding is that for every 10ppm of chlorine that dichlor adds, it also adds 9ppm of CYA. Once the CYA is around 50, go to using bleach.