CC higher than FC

[JimK]

That's fine. While you are at shock level, you might want to consider the 10ml. 30 drops vs 75 is a bunch, especially if you are testing a lot. Just a thought.

At high FC levels I've even used a 5ml sample (1 drop = 1ppm) to save reagent.

For normal everyday testing I use a 10ml sample. I never use a 25ml sample for FC. IMO, unless you're running FC really low, the .5ppm resolution 10ml sample size offers is fine.