Bluelab pH 4 Calibration Solution

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A pH 4 calibrating solution for Bluelab devices.

No matter how good, every pH meter needs calibration. By calibrating, you make sure that the device is functioning properly and doesn't give false readings. 

For best results, you should use two calibration solutions - one nearing the lower values and one nearing the higher values measured often. For hydroponic farming, growers use a pH 7 and a pH 4 buffer.

Available options:
- 20ml
- 250ml

If you have any questions, don't hesitate to contact us at info@higarden.eu.