Clear, but no chlorine???

[JimK]

So continue to keep the pool at shock level- 30- and see what happens to the CC.

btw: the skimmers again have a very thin line of sticky, greasy, black stuff around the waterline. I was going to wet a cloth with chlorine and wipe. Never had this before last Sunday.

I occasionally get the same black goo in the skimmers. I just clean it off when I notice it. It's been happening for years, but I've never notice a negative impact on the pool from it.