GPF Uptake (fulvic acid) Size:23L the Bluelab® pH Pen and

the Bluelab® pH Pen and Bluelab® ppm Pen

With only one moving part

RH and temperature readings

• Made from durable

2-Channel Low Drift NDIR Sensor precisely reads CO2 ppm levels

GPF Uptake (fulvic acid) Size:23L the Bluelab® pH Pen andGPF is a premium lower molecular weight humate that plays a vital role as a chelator of essential minerals and organic compounds allowing them to pass through cell membranes much more efficiently. GPF plays the same role as GPH but can be used in hydroponic or re circulating systems. This product is sourced from the highest quality humates on the planet today. How it works GPF Uptake is a water soluble formula of low molecular weight humic acid that