When I take water samples into the pool store, they always say my pH is high, 8.2, but when I test it at home (3 way Hth tester), the pH is fine, right at 7.4. Sunday I picked up some 6 way test strips (I wanted a way to test my CYA), and they say my pH is high, 8.4. So what gives? I thought the drops was a better way to test, but for some reason it's not when it comes to the pH.