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The Pre-Evolution is recommended if more than 150 gallons per week is produced
and PCBs (organic chlorine)
Only apply
conductivity and temperature readings
Bluelab Guardian Monitor Connect Hydroponics The Pre-Evolution is recommended ifStay connected to your crop 24 7. Monitor, data log, and remotely view pH, conductivity and temperature readings. The Bluelab Guardian Monitor Connect is not only a constant indicator of the desired levels of pH, conductivity and temperature of your nutrient solution, it also data logs these critical parameters to your computer for you. It does not stop there. You can access the data via the cloud from a remote mobile device or computer to check these