last night at 10:30 pm CL was 4, this morning at 6:30 am it was 3.5 with .5 CC. So, should I shock, add algaeside, filter more? I've added 8 lbs of baking soda to move the TA from 80 to 100 and I've added 4 lbs of borax to move the ph from 7.2 to slightly under 7.5 (the color isn't quite 7.5 but definately not 7.2)