First look at the Salifert Potassium test 'in the wild'

[Whitebeam]

That's the idea. You run a test using the reference solution as the water sample and compare the reading to the stated concentration of (in this case) potassium from the side of the bottle. You now know how accurately the combination of your chosen test and your ability to perform it can measure that element.

Peter

 

[thefuz]

Where'd you find that FM Multi Reference, Whitebeam? I only see it available in the EU currently. Seems like a hidden gem solution!!

 

[ZR1001]

Cherry Corals sells it.

 

[Whitebeam]

Cherry Corals sells it.

That's the one I spotted it in. In fact, that's the only US mail order supplier of anything that I know of ;-)

Peter