Is this black algae, or could these small black dots be from a bad chemical addition? You can see the size of a jet in the picture for reference. They are really small black dots.
I'm new to the forum, I'll be doing a couple other posts about pool chemistry.
Here is a pic of the pool, overall, the pool seems in ok condition, my 'simple' test kit the basic properties or OK. Taylor 2006 kit should be in on Saturday, and will post results.