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A pH meter is only as reliable as its last calibration, and skipping that step is one of the fastest ways to over- or under-correct a nutrient solution. Aqua Master Tools' pH 7.00 Calibration Solution resets your meter to a precise, NIST-traceable midpoint, giving you confidence that every reading afterward is accurate.
Sold as a case of 18 bottles at 100ml each, this larger format is built for shops, commercial growers, or anyone calibrating meters often enough to want a bulk supply on hand rather than reordering single sachets.
Certified pH 7.00 formulation calibrates meters to a recognized national standard.
Ships as a case of 18 bottles, ideal for frequent calibration or commercial use.
A larger volume per bottle than single-use sachets, suited to repeated calibrations.
Stays accurate when stored between 15-25°C, ideal for grow rooms, tents, and labs.
| Specification | Value |
|---|---|
| Solution Type | pH 7.00 Calibration Solution |
| Volume per Bottle | 100 ml |
| Bottles per Case | 18 |
| Standard | NIST-Traceable |
| Storage Temperature | 15 – 25 °C |
This case includes 18 bottles of 100ml pH 7.00 calibration solution.
Once opened, close the bottle immediately after use and do not return used liquid to the bottle, as this can introduce contamination and affect calibration accuracy.
pH 7.00 represents the neutral midpoint on the pH scale, making it a standard reference point for calibrating most consumer and commercial pH meters.
Keep bottles sealed and store them between 15-25°C, away from direct sunlight and extreme temperatures, to preserve accuracy until use.
For best accuracy, many growers use pH 7.00 alongside a second point like pH 4.00 to perform a two-point calibration across the meter's working range.
For frequent or commercial use, a bulk 100ml case typically offers more solution per dollar than individual 20ml sachets, while still maintaining the same NIST-traceable accuracy.
Our specialists are happy to help. Call us or send a message and we'll get back to you within one business day (most of the time within a few hours.)
Equipping home growers, craft producers, and commercial operations across North America since 2016.
