Would the use of an anti-scaling product in spa water interfere with the calcium test? I'm getting a very very pale red, almost invisible, then a very very pale blue endpoint, almost clear.
I tried the usual adding of a few drops of titrant before the titration and no change.
I also tried adding a few grains of CaCl to the sample in the hopes of getting some real color happening, but no go.
I tried the usual adding of a few drops of titrant before the titration and no change.
I also tried adding a few grains of CaCl to the sample in the hopes of getting some real color happening, but no go.