The Easy Test 6in1 JBL is a quick and uncomplicated test mainly to get an overview of the most important values in the aquarium. These test strips can be the water values: GH, KH, pH, NO2, NO3 and CI2 determine within one minute. Furthermore, we not only have the test scores, but you can, which is a great help for beginners, reading about a smiley system if the values are good or bad. "In the accompanying leaflet can also find information on how certain values increased or be reduced. On the whole I am satisfied with this product. But I personally would droplet tests (test sets from JBL) prefer, as they still are a little more accurate than the test strip.