Test your potassium? (Zeovit users in particular)

[Delphinus]

I went and bought the Korallen-Zucht Kalium potassium kit today.

So I've already encountered a frustration. You're supposed to look through the opaque liquid, and the point where you can't see the colour anymore on the test strip tells you the potassium concentration ...

What if the liquid is completely opaque? I might as well been looking though skim milk. Does that mean my potassium is 400 or higher? That seems implausible seeing as I've never dosed or done anything about potassium before.

Any hints from the zeoheads here?