General Hydroponics, Standard Reference Solution @25c, pH 4.01, 1 Qt.

The General Hydroponics Standard Reference Solution pH 4.01 is a 1 quart solution designed for calibration and testing purposes in hydroponic systems. Manufactured in the United States, this product is a reliable option for ensuring accurate pH levels in your hydroponic setup. It serves as a standard reference solution at 25 degrees Celsius, providing users with a known reference point to calibrate their pH meters and maintain optimal conditions for plant growth. Ideal for hydroponics enthusiasts and professionals alike, this solution helps to ensure precise monitoring and control of pH levels for healthy plant development.