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again, I am not defending test strips as the ONLY solution, but as indicated sometimes the drop tests are off more then than the test strips. TF-100 is the best of course

just got my TF100 a year or so ago, so only correlated for about a year, but yes they are pretty accurate in that time frame

wow, strong comments. I have been using test strips for 10 years and find them almost always in the ball park.

Thanks, I feel "un-vilified" :) Yea, when I know the PH is lower than the drop test is indicating I use the strips to verify as frankly they seem pretty accurate to me, and yes for a quick FC test, they also work great...but of course will not abandon my TF100!

OK, I know I will take a lot of grief here, but not sure what everyone has against test strips. Yea, they are not perfect by themselves, but: when FC is a bit high, PH test seem way off on drop test, cannot distinguish the color, but test strips seem accurate when FC is above 5 cannot tell...