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Calibration Fluid

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To ensure your salinity testers and ph probes are working correctly, or even to double check your using your test kits properly calibration fluid is an essential part of a reef keepers toolkit.

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  1. Tropic Marin Multi Standard 250ml
    £13.95
    Available from supplier
  2. Tropic Marin NP-Standard 50ml
    £11.95
    Available from supplier
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