what do i do first. I have to vacuum bottom dirt to waist and add water to keep water level at correct point. do i adjust cya first. then i'll have to wait for it to dissolve before adjusting ph and cl. Do i finish cleaning pool and then add cl before adjusting cya. my cya is at 10 ph 7.2 and cl 2.0. all of this will change because i have to keep adding water while vacuuming to waist. THANKS