Test results were mine from a K-2006. I testing this a.m. and the FC was 2.4 and the CC was 2.4, the PH was 7.2, so it's clear that my keeping on adding the 4# of Borax is being defeated by something in the 4 in 1. I am going to try to break the CC down with Chlorox. Just have to figure out how much I need to get FC to 15.