Finally got a testing kit to use instead of the strips. My PH tested at 7.2 today using the kit. Yesterday, a test strip read 6.8. Considering I am aggressively aerating the pool, that makes sense to me. BUT, My TA tested at 80 using the kit. The strip showed 240 yesterday. My hardness tested at 210. The strip yesterday; 400. WOW! That kind of difference makes me understand why so many of you in this forum dislike the strips. How can they be that far off? Needless to say, I'm never, ever, going to test with anything but a kit again.