Hi all! Last season when I tested my FC, it seemed like once I put my R-0871 drops in and the sample became clear, it stayed clear. I ordered a replacement set this season, and now when I put my drops in and get it back to clear, if I let it sit there for a few seconds/minutes, it turns somewhat pink again. So I’m not 100% sure what my reading should be. I’m trying to SLAM my hot tub... thank you!!