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Calibration of conductivity/salt meters requires a test solution with a known salts level.  Optimum Hydroponix 13823 ppm offers a reliable, cost effect option.

Optimum Hydroponix TDS Calibration Solution 1382ppm 500ml

SKU: WE-OPT13/82
C$18.30 Regular Price
C$14.64Sale Price
  • Read label before using. Keep out of reach of children and animals.

    Storage: Store in a cool place. Protect from exposure to excessive heat.

    Safety Precautions: Do not swallow. In case of contact with eye; rinse with water for 5 mins; consult a doctor.