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    R-0871 Chemical/Bottle Self Life and Disappearing CYA

    FC 4.5 (TF-100), 7.0 (Leslie’s), 5+(OTO) TC 7.0 (Leslie’s) Ph 7.6 Alk 100 CYA 30 Not a new member, but an infrequent poster who forgot his username. Been troublefree for 2 years since I started. Based on the large variation in FC test results as shown above, I’m wondering if my R-0871 may have...