pH Calibration Powder [pH 9.18, pH 6.86, pH 4.00]
pH Buffer Powder. Makes 250ml of solution.
pH 9.18, pH 6.86, pH 4.00
Can be used to buffer the "yellow" pH meter. Do not use with Blue Labs.
When product is sold out, please subsitute with Bluelab calibration solution, which will also work with your yellow meter.
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