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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's pH 7.00 Calibration Solution resets your meter to a precise, NIST-traceable midpoint in seconds, giving you confidence that every reading afterward is accurate.
Each box holds 25 individually sealed 20ml sachets — enough single-use solution to keep meters dialed in across an entire grow cycle without the contamination risk of a shared bottle.
Certified pH 7.00 formulation calibrates meters to a recognized national standard.
Box includes 25 individual 20ml sachets, enough to last a full growing season.
Individually sealed packs prevent contamination, so every calibration starts fresh and accurate.
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 Sachet | 20 ml |
| Sachets per Box | 25 |
| Standard | NIST-Traceable |
| Storage Temperature | 15 – 25 °C |
| Package Dimensions | 7.48 × 3.35 × 5.91 in |
Most growers calibrate weekly, or any time readings seem off from expected values. Regular calibration keeps nutrient dosing and pH adjustments accurate.
No, each 20ml sachet is meant for single use. Reusing solution can introduce contamination and lead to an inaccurate calibration.
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 sachets 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.
Each box includes 25 individual 20ml sachets, giving you 25 single-use calibration sessions for your meter.
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.
