Bluelab pH 4.0 Calibration Solution | 250ml pH Meter Calibration Fluid oversized PTFE coated blades for rust

PTFE coated blades for rust resistance and a smooth cutting action

cheap tool for monitoring pH and temperature on the go is the Bluelab pH Pen

and indoor setups

1x Astroflower 1L

Bluelab pH 4.0 Calibration Solution | 250ml pH Meter Calibration Fluid oversized PTFE coated blades for rustBluelab pH 4. 0 Calibration Solution is a high quality reference solution designed to accurately calibrate all types of pH meters and pens. Regular calibration is essential for ensuring reliable pH readings, which are critical for healthy plant growth and nutrient uptake. This 250ml bottle provides growers with a professional standard solution trusted by hydroponic and horticultural growers worldwide. Key Benefits Provides an accurate reference point