Assuming you did the test correctly, there is 0,36 ml left in the seringe which means you used 0,64 ml.
0,64 ml used = 1280 ppm magnesium.
eta : or maybe not. Did you use the original seringe that came with the kit ? It looks like a different one and if so, it won’t work.
0,64 ml used = 1280 ppm magnesium.
eta : or maybe not. Did you use the original seringe that came with the kit ? It looks like a different one and if so, it won’t work.