Hanna GroLine Monitor Replacement Probe DH4AS35FP or they can be used

or they can be used for flowering by stacking the GMGP443 on top of this GMGP664

Together Dual Fuel 1 & 2 result in rich green leaves in the vegetative stage followed by big and beautiful blooms in the flowering stage

Adjust pH value of the final nutrient solution between 5

Special retainer that prevents the top from tipping

Growers HP allows the user to maintain precise control of their feed

Hanna GroLine Monitor Replacement Probe DH4AS35FP or they can be usedThe HI1285 8 multiparameter probe measures pH, EC TDS, and temperature in one convenient, rugged probe. Use with the HI981420 GroLine Monitor to provide around the clock, continuous monitoring of pH, conductivity (EC & TDS), and temperature in hydroponic nutrient solutions. One probe. Three measurements. Built in temperature sensor ensures fast, accurately compensated readings even during sudden temperature fluctuations. Specialized for hydroponics