-> blue--just like hydrangeas!  There is a "universal" test paper that is a
-> combination of different indicators normally yellow and can give a general
-> indication over a range, but it isn't very accurate.
Yeah, thats what I was thinking of... like I use to test the water in my
aquarium.
But still, I thought litmus paper shifted to several degrees of pink (or 
lue)
that you checked on a chart to read the Ph.
Just thought that you could test a liquid, and compare that reading with what
this gizmo gave you.
BTW I had one of these years back, and it did work well enough to use for
plants. You do need to use a scour pad on the metal tines before you take a
reading, to remove any oxidation.
I also had a rather expensive Ph pen that was suppose to be very acurate. It
came with a small bottle of calibration liquid. It was used for measuring the
Ph of hydroponic solution.
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