Bluelab pH4 Calibration Solution 250ml

pH 4.0 calibration solutions - a must in every grower's toolbox! 

• Contains 250 ml/8.4 fl oz 
• Boost your pH products’ longevity with regular cleaning and calibration

Type: A clean probe is an accurate probe

Bluelab pH Pen Cleaning Instructions

Bluelab pH & Soil pH Probe Cleaning Instructions

Bluelab Soil pH Pen Cleaning Instructions

pH 4.0 calibration solution MSDS