I'm a bit confused with my test results, the figures seem too high. I've read that I should have:
NH4 <0.2 ppm
NO2 <0.2 ppm
NO3 <0.3 ppm
PO4 <=0.07 ppm
but the JBL test kits I have ranges that are much higher. For example the NO3 test steps are 0, 1, 2, 5, 10, and so on, so measuring to a tenth...