I'm a little concerned that you've reported FC of 0. You may be losing all your FC each day.

Are you available to test / dose more often during the day? If you can, I'd recommend you dose 2oz to 3oz of dichlor at a time (a little overshoot won't hurt) and never let FC fall below the Best Guess minimum. If you can only test / dose once a day, I'd recommend you keep increasing the dose until you still have the minimum FC when you test again.