This is my 2nd year as a pool owner. My first year was great with only a couple issues of yellow mustard algae that I was able to quickly correct.
This year has been a pain.
Every few days the bottom of the pool starts to look a little dingy. Guest would not notice but enough that I know. If I brush the bottom a dark cloud of matter appears.
I have vacuumed/drained the surface, shocked many times to 20PPM. Everything will look great for a few days and then it is back.
The water is balanced. I’ve used a digital tester and Taylor test kit. Right now my CL is at 9 since I added more yesterday.
It impacts the entire pool – almost evenly with the corners more noticeable.
16x32 IG Vinyl, 17k Gallons