VTKolor Eco is the most simple version of colourmetric and titrimetric test kits. These tests are suitable for visual evaluation and very convenient, because of the muticomponent and inexpensive method of screening tests of non-turbid and uncoloured water samples. The reagent bottles are packed in practical pouches. The colour comparison chart and test instructions are provided on a waterproof card, making it long lasting and easy to access.