I would use the 7.2. Run the test, read it, then ignore any changes that happen after the fact. I have other tests that have done that in the past, too, and Ben always advised to read the immediate result and disregard any later changes.
Janet
Re: ph test phenol red reads 7.2 then jumps to 7.5 !
I would use the 7.2. Run the test, read it, then ignore any changes that happen after the fact. I have other tests that have done that in the past, too, and Ben always advised to read the immediate result and disregard any later changes.
Janet
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