Began a SLAM tonight. I I added muramic acid to bring my PH down to 7.2 and added liquid chlorine to bring my FC up to 20 (CYA is 50). As I was putting everything away I glanced at my bottle of acid and realized it is 31.45% instead of the 15.7% in usually use. Pool Math says that much acid should bring my PH down to 6.1. I tried to test my FC an hour later and I got a reading of 45. I know my FC can't be that high. Can the low PH be affecting the FC test? Am I wasting my time to keep testing FC tonight until I can bring up my PH tomorrow?