KCL Storage Solution 120ml pH Probe and Pen, Maintain Meters Used for Water, Soil, and Hydroponic System or Indoor Plant Grow White - Bluelab STSOL120

• 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