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Neptune Store organization Logo Use this fluid to calibrate your pH electrode. This is, along with the 7.00 pH solution, the most commonly used fluid to calibrate your electrode for monitoring pH levels in your aquarium. If you want to be sure your pH electrode is giving the correct va…
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271 reviews

7.00 pH Calibration FluidFluid

Use this fluid to calibrate your pH electrode. This is, along with the 7.00 pH solution, the most commonly used fluid to calibrate your electrode for monitoring pH levels in your aquarium. If you want to be sure your pH electrode is giving the correct value, you will need the 4.00 pH calibration fluid.

Product number: CAL7

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