Bluelab® pH Probe for Solutions Black Gloves Kelp is an all-organic powerhouse

Kelp is an all-organic powerhouse at optimizing soil changes for strong

The valve must be intact and the tank must not be completely rusty

and other plant insect parasites

Compatible with most base nutrient programs

Bluelab® pH Probe for Solutions Black Gloves Kelp is an all-organic powerhouseBluelab PROBPH pH Probe for Water, Replacement Electrode for Meter, Monitor, and Controller with Easy Calibration, Tool for Hydroponic System and Indoor Plant Grow Easy to clean because of its bullet shaped glass bulb. Fully waterproof and less fragile than all glass electrodes because of its tough polypropylene barrel. Gel filled (non refillable) making it maintenance free and a double junction reference providing longer life. About this item