I figured I would give another go at raising stabilizer to 70, so added another 2lb(20ppm). Tested at got maybe 60ppm. I’ve added 10lbs of cya so far since opening. I know it’s not a big deal, just find it funny how it doesn’t match expectations. I feel like this test might work for deionized water in lab, maybe not so much for pool water. Wish there was something better but doesn’t seem to be.