Evan (waterbear),

I wonder if one could use more indicator drops (10 instead of 5) in the test for a more intense color. Normally the amount of indiciator drops doesn't significantly affect the test result unless the amount of indicator overwhelms the amount that is being tested or unless it influences the test itself (possibly in pH). I suppose this is a simple experiment any of us could do with the pH, TA and CH (and FAS-DPD?) tests by first measuring the normal way and then repeating (with a fresh sample) using double the amount of indicator to see if there's any difference. If there isn't, then perhaps those who want a more intense color could use this technique. They'll be replacing their indicator reagents more frequently, but that might be a worthwhile expense.

Richard