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 FeaturesPurpose: 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 UseAvoid 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.
