Simply add KCl solution to the cap of the pH pen and pH probe for storage and hydration to extend their life and improve accuracy for precise pH up and down adjustments
Designed for use with Bluelab pH pens, Bluelab soil pH pens, Bluelab pH probes and Bluelab soil pH probes
Try Bluelab TDS (PPM) meter, tester and other hydroponics tools for full garden nutrient monitoring in water and soil
KIT INCLUDES: 1 bottle of storage solution at 120ml, Instructions are on the label of the bottle
Supplied by Bluelab, the industry leader in hydroponic testing equipment, built for growers