5 days ago I began the SLAM process. All during the SLAM I kept my FC at 20 (CYA is 50). All during this process, CC did not register at all. This morning the water was clear for the first time in days. I figured it was time to try the OCLT. FC was 17. At noon FC was 10 and for the first time since I started the SLAM, I got a CC reading of 1. My question is twofold. At what FC level does CC show up in testing and should I go back to SLAM again since the CC measured 1.