color cards are not insightful
When I bought this product I was hoping I would be able to quantify the concentrations of NPK in my soil. To my surprise, the color cards are very approximate. Rather than specifying concentrations by ppm, they only say "High, High to Medium, Medium, Medium to low, Low".
The product motto states; "Taking the guesswork our fo gardening", but it actually leaves you somewhat guessing. I have e-mailed the producer and they did send number values corresponding to the colors immediately. So that is something to their credit. When asked why they don't write the numbers directly, they saud I was the first person to ask for them.
Additionally, the colorcards are printed on a simple leaflets, and we all know how variable color printers are. I was sincerely expecting to have reliable color card legends with numbers, similar to the ones provided by LaMotte and API.
The "detailed instruction booklet" is sometimes writteng in a confusing or contradictory way.
It's nice that the different reactants and "reageerbuisjes" are color-coded even though it is also confusing: Nitrate has a red label, but a white cap; PH has a black label, but a red cap...
