This is my third SLAM I have done, but things are a little different this time. In the past I always had a CC reading that went to zero just about he same time the water looked clear. This time my CC has always been zero (even though the water was definitely NOT clear to begin with). Throughout the SLAM my water has been getting more clear but the CC has remained at zero. Since I don't have an objective CC reading that will go to zero when I am done I am having a hard time knowing when my SLAM is over. I keep on asking myself, "is the water really 100% clear?". Any advise would be appreciated. Thanks.