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Hydrogarden Buffer 4 Calibration Fluid

PH buffers are solutions of a known and fixed PH which are used to calibrate meters and should be done on a regular basis to ensure ongoing accuracy from the meter.

 

Pour out a small amount to use for calibration and then discard solution when finished, do not pour back into container.

Use PH buffer 7 to calibrate meter to neutral and then use PH buffer 4 to calibrate the correct acidic level for meter.

 

 Calibration Fluid Buffer 4 250ml
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