Salifert Calcium: “a clear blue color”
So, what exactly is ment by “a clear blue color”?
Generaly it goes from pink to blue-purple, then hazy blue then clear. Today blue purple = 0.25 375ppm Hazy blue = 0.22 380PPM Clear blue = 0.20 400PPM |
My procedure was to add drops (fairly slowly towards the end of the titration) and swirl well for a few seconds, then stop when the last purple disappears. I think a few seconds between drops was fine for the Salifert kit.
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Goes from a Dirty purple to the FIRST sign of blue. That's where you stop. One drop at a time as you near the reaction
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