I have the dreaded 'way too much CYA' problem. CYA level is too high for the test in the K-2006 kit to measure. I have switched to Bleach and am keeping the Chlorine level between 8 and 15 ppm as suggested. Now I need to take the next step and replace some of the water. In-ground pool with a DE filter. Is it as simple as shutting off the skimmers and running the main valve in the backwash setting?

Thanks in advance.