Precision Calibration for Aquarium Testing The ATI® Multi Standard is a high-precision seawater reference solution designed to verify the accuracy of your home testing equipment. Whether you are using titration test kits or electronic measurement devices, this solution provides a stable, laboratory-certified benchmark. By comparing your results against known concentrations, you can identify "offset" values or confirm that your equipment is functioning correctly, ensuring the long-term stability of your reef aquarium. Why Use a Multi Standard? Testing accuracy is the foundation of successful reef keeping. Over time, reagents can degrade, refractometers can drift, and electrodes can lose calibration. Validation: Confirm if your Alkalinity, Calcium, or Magnesium test kits are providing true readings. Calibration: Adjust refractometers, hydrometers, and conductivity meters to a perfect 35 PSU standard. Based on Absolute Ocean: This solution is formulated from ATI® Absolute Ocean, which perfectly replicates natural seawater, ensuring the chemical behavior of the reference matches your aquarium water. Laboratory Certified: Every batch undergoes strict quality control at the ATI® laboratory in Germany to guarantee the listed values. Reference Values (Certified Targets) The ATI® Multi Standard contains fixed, precise concentrations of the most critical seawater parameters: Parameter Reference Value Salinity 35 PSU Alkalinity (Carbonate Hardness) 7.5 °dKH Calcium (Ca) 421 mg/l (ppm) Magnesium (Mg) 1,313 mg/l (ppm) Potassium (K) 408 mg/l (ppm) Strontium (Sr) 8.1 mg/l (ppm) Usage Instructions Preparation: Ensure your test vials and equipment are clean and dry before use to prevent cross-contamination. Testing: Perform your measurement exactly as you would with aquarium water, but use the ATI® Multi Standard instead. Comparison: Compare your result to the values listed above. If your test kit reads 8.5 dKH but the standard is 7.5 dKH, you know your kit has a +1.0 dKH offset. Storage: Close the bottle immediately after use to prevent evaporation, which would increase the concentration and invalidate the reference values.
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