Talk about a good deal. I've tried the TDS and EC meter and they seem to work fine. I didn't have a stable solution to test or calibrate it with, but they seemed to work fine. The green soil tester was a somewhat unreliable thought. I was hoping to keep an eye on the soil in my garden, but the meter didn't seem to move at all on the PH scale. I tried to wet the ground and only then did I get some exercise, but not much. I know my soil is acidic because I've done several soil tests by local expansion and they didn't match this meter. Either this counter is unreliable or the extension is doing something wrong. I leave that to you to decide. This may just be user error, but unfortunately the included instructions won't be able to help me as they are very vague and sparse.
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