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๐ ๐๐ ๐ ๐๐๐๐๐๐๐๐ ๐๐๐๐ ๐๐๐๐๐๐ - Test the most important 9 parameters - Iron (Fe), Copper (Cu), Nitrate (NO3), Nitrite (NO2), Chlorine (Cl2), Total
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