Brushing helps get the debris that has settled back into solution. If you have a chance to take another sample to the pool store for testing, do that. It would be good to make sure you have no CC (or less than 1 ppm, anyway) and we could start working on raising the pH just a little. My concern is that if the FC is over 10 ppm when they test, the pH measurement may not be accurate. You said you had ordered the Taylor K2006. What is the expected delivery date?