best meters available in my opinion
Verified purchase: Yes | Condition: New
I am a novice hydroponic gardner, The test pens have worked great so far, to control my PH and EC.
Verified purchase: Yes | Condition: New
Probe came Prehydrated and calibrated. Blue Lab is Top of The Line Trusted brand in Colorado.
Verified purchase: Yes | Condition: New
Easy to use and accurate enough for my application.
Verified purchase: Yes | Condition: Pre-owned
I love these pens, perfect and precise.
Verified purchase: Yes | Condition: New
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