“Super happy with the price and it showed up crisp clean and undamaged and on time zero complaints pen works wonderfully. I live in BC long trip that's says a lot.”
“Bluelab pens are the best ph pens out.
They are more accurate and stay calibrated longer than any other instrument. I have owned dr.meter, Hanna and the cheap amazon yellows and nothing compares.
Grow daddy has the best price.”
