Hi, I've been lurking for awhile and this is my first post. We had a 20000 gal inground put in 2 years ago. It is currently on an autofeed trichlor system with 3" pucks. I want to switch to household bleach. I just had my water tested at a pool store and the CYA level came back at 70. I have also invested in a Taylor k-2006 test kit but haven't received it yet. My question is...If my CYA level is actually at 70 and i switch to liquid bleach, will that be the highest the CYA will get? Will it start to diminish with water replacement from filter backwashes, lowering levels after rain storms, splashout etc? Thanks for any help.