Softening should have been really good right after a regeneration.Wow, I knew my settings weren't optimal but I didn't think they were that far off.
Consider selecting from one of these pairs of C and H below.
The less salt per cubic ft, the more salt efficient, but more hardness breakthrough.
Revised based on number from https://terrylove.com/forums/index.php?threads/help-for-programming-fleck-5810.82673/#post-595983
BLFC = 0.5
cubic ft resin = 0.87
Alternative C and BF pairs:
lb/cuft ; C= ; BF=
3.448 ; 13.3 ; 2
5.172 ; 16.9 ; 3 ;Leaner than most
6.897 ; 19.5 ; 4
8.621 ; 21.5 ; 5 ;This is where I might go
10.345 ; 23.1 ; 6 ;more salt than most, but I would probably go there with only 0.87 cuft of resin
12.069 ; 24.3 ; 7
13.793 ; 25.3 ; 8
15.517 ; 26.2 ; 9
I understand that C is only programmable in whole numbers in the 5600SXT. Truncation would be the better choice.