Now that our water is clear we can see staining. There are 2 different ones that no amount of brushing seems to be getting rid of. The first and most troublesome, as it looks horrid, is a black ring around the pool. The second is a yellow stain on the floor of the shallow end.
We got a lot of rain last night and had to do a partial drain this morning. Brought FC levels back up to 12 and gave my sock a few squeezes. We have been able to see the black stain for a little over a week, I think. The yellow stain we just noticed yesterday. Any ideas what they could be and how to fix them?