Description:

The Dymax pH Buffer 4.0 (150ml) is a specialised liquid solution primarily used for the calibration of digital pH meters rather than as a direct water treatment for your aquarium.

Using a buffer solution ensures your pH testing equipment is accurate, which is critical for maintaining a stable environment for fish and plants.

Key Product Features
Purpose: Calibration fluid for pH meters and electrodes.

Standardisation: Certified traceable to NIST (National Institute of Standards and Technology) standard reference materials.

Temperature Sensitivity: The pH value of the solution shifts slightly based on temperature. For the most accurate calibration, refer to the temperature scale on the bottle:

20°C: pH 4.01

30°C: pH 3.98

40°C - 60°C: pH 3.97

Best Practices for Use
Avoid Contamination: Never pour used buffer solution back into the original bottle. This will contaminate the remaining fresh liquid and ruin future calibrations.

Storage: Keep the bottle tightly closed and store it in a cool, dark place to maintain its shelf life.

Two-Point Calibration: For the most accurate results, most hobbyists use this pH 4.0 buffer in conjunction with a pH 7.0 buffer to "bracket" the expected range of their aquarium water.

Why calibrate at 4.0?
While most freshwater aquariums are kept between pH 6.0 and 8.0, using a 4.0 buffer is essential for testing "low-range" accuracy. If you keep soft-water species like Discus, Rasboras, or certain shrimp that require acidic conditions, ensuring your meter is accurate at the lower end of the scale is vital.