Essentials Buffer pH 4 250ml

Keeping your pH meter calibrated is essential for taking accurate readings and keeping your nutrient solution within the correct pH range. Essentials pH buffer 7 provides a solution for you to accurately calibrate your pH meter.

• Essentials pH Buffer 4. A stable pH calibration fluid
• 1 Litre – enough for several calibrations
• Use regularly to keep you pH meter calibrated
• Helps to ensure accurate readings
• Can be used with any brand of pH meter