I had the CYA tube filled to the top and, while slightly cloudy, I could still see the black dot. I do have a sock hanging in the water, so I squished it several times and am planning on retesting tomorrow.
My husband, being the lazy person he is, left the pool half-filled for two weeks before filling it the rest of the way and hooking up the filter and swg. It turned green as soon as I added bleach and salt. The water is clear now, but there's still some yucky stuff on the pool bottom and walls. Also, I am not getting a reading on my ph. When I add the red drops, the water only has a slight pink tinge.