pH Buffer Calibrating Solution

CRS PH CALIBRATION SOLUTION is designed to accurately calibrate pH Probes for testing equipment for hydroponics, home aquariums water with your pH tester/meter. Ideal for testing pH balance of drinking water, aquarium, RO system, or hydroponics.
PH is actually a measurement of the activity of hydrogen ions in the sample. pH is a numeric scale used to specify the acidity or basicity of an aqueous solution. The pH value of a neutral solution is 7.0. Solutions with a pH value below 7.0 are considered acidic and solutions with pH value above 7.0 are basic (alkaline). This pH calibration test solution is perfect for calibrating pH tester/meter).

NOTE: This Item includes a bottle of 4.0 and 7.0 pH Buffer.