Description

This pH buffer solution at pH 4.0 is an essential calibration fluid for all pH meters and probes used in hydroponic, coco coir, and soil growing systems. Regular calibration using certified buffer solutions ensures accurate readings — and accurate pH readings are critical for maintaining the correct nutrient uptake window for your plants.

Calibrating with a pH 4.0 buffer solution alongside a pH 7.0 solution gives a two-point calibration, providing the highest possible accuracy for pH meters operating in the 4–7 range most commonly used in horticulture and hydroponics.

• pH buffer solution at 4.0 — essential for accurate pH meter calibration
• Used in two-point calibration alongside pH 7.0 solution
• Compatible with all standard pH meters, probes, and electrodes
• Certified reference solution for precise, reliable readings
• Essential for hydroponic, coco, and soil growing environments

Keep your pH meter accurate and your plants healthy. Available at The Horticulture Company.