Iron is naturally present in water in low concentrations, but it reaches high concentrations in wastewater effluents. The iron concentration in water needs to be monitored because it becomes harmful above certain levels. In domestic water, for instance, iron can unpleasantly alter the taste, stain laundry, damage kitchenware and favor the growth of certain bacteria. Iron is also an indicator of ongoing corrosion in industrial plants or in water cooling and heating systemicrosecond. Moreover, iron is normally monitored in mining wastewater to avoid contamination. Generally, ground and surface water contains no more than 1 micrograms per litre iron; but due to mining and industrial drainage, higher levels of iron have been observed. Iron in water appears to be more of a nuisance than a hazard. Kit comes with 50 packets iron reagent, color comparison cube, 20mL plastic vessel, 30mL hardness MR reagent and 50mL calibrated plastic vessel. Kit for 50 Iron and 50 Total hardness tests. Colorimetric and titration methods. Range: Fe 0-5 micrograms per litre, Total Hardness 40-500 micrograms per litre. Phenanthroline and EDTA chemical methods. 260 grams.