On some tests, like calcium hardness and TA, you add solutions dropwise until the water in the test chamber turns from one color to another, then multiply by 10 to get your ppm.
My question is, if you have a good idea of where the number will end up, do you really have to add drops one at a time and swirl, or can you add quite a few to get you close to where you think the number will be, and then slow down to dropwise?
Example: My calcium hardness is usually around 230 ppm. Using my Taylor DPD kit, I am to add R-0012 dropwise until the solution turns from red to blue. Knowing this, is there any harm is adding 18 drops, swirl, and then add one drop at a time (and swirl) from that point forward until my solution turns blue?
Thanks for your input.