Bluelab CAREKITPH pH Probe Care Kit with Calibration Supplies, Storage Solution, and Brush, Used for Pen, Meter, Monitor, Controller and Tools for Hydroponic System and Indoor Plant Grow, Clear

Everything you need to clean, hydrate and calibrate pH probes. Probe cleaning, hydrating and correctly storing pH probes ensures you get the most accurate readings possible and will maximize the life of the pH probe. pH instruments require calibration once a month and should be cleaned prior to calibration. The handy pH Probe Care Kit has everything you need to maintain your Bluelab pH Meters, Monitors or Pens.