Added 7 gal. bleach @ 10p. Here are my results @ 11:30p: FC=14, CC=1, Ph=8 (3 drops R-0005 brought pH=7.7). Results @ 8a: FC=7.5, CC=1, pH=8 (2 drops R-005 brought pH=7.4), TA=70, CH=275. CYA test was as you described, each time dot did not disappear. I have not added anything but bleach since my last post. Thank you for the links & the help!