Okay, can someone explain this to me? I keep hearing that CYA takes a while to show up on the test. What does that mean, exactly? If the granules have dissolved, why wouldn't the impact show on the test as soon as it's been circulated? Are they simply referring to the fact that it takes a while for the CYA to dissolve, or is there some other interaction that takes time to occur before it's "active" CYA?
I just don't understand how CYA can be in the water in a specific concentration, yet not show up on a test for several days.