In previous posts readers have been advised in testing calcium that you need to keep swirling the vial for 20 to 30 seconds to mix thoroughly between drops. If your calcium level is near 300 ppm then the test would require 10 to 15 minutes. Are there any valid means to speed up the test and still achieve accurate results?
For example, can you quickly mix the first 20 drops since you know your pool calcium level has consistently tested above 200 and pool calcium levels do not change quickly?
If you do not mix thoroughly does the calcium test give results that are too low, too high, or just plain unpredictable?