Switch to 10ml FC tests if you're using 25ml. (Assuming you felt it was in between 2.6 and 2.8 and guessed 2.7). There is no need for 0.2 resolution as a 2.5, 2.6 and 2.8 all equally suck. The # before the decimal point is super important, not the one after it.Tf 100
So save 2.5x the supplies and each drop is 0.5 FC with 10ml.