I have been using bleach to get my FC up to 6 (cya about 60-70) but am struggling to get it there. Using over a gallon of bleach daily, which seems a little too much. I want to get the FC up high and see what the daily liquid chlorine use is once its "up there." The pool shop guy told my the pucks of di and trichlor have the CYA in them , but not the shock bags...Does anyone know if that is true? Can one use dichlor granules without fear of getting into CYA overdose? Muchas Gracias..