First post! Turning to you guys for some much needed help. Hopefully I am in the right forum.
I have a vinyl above ground pool.
According to my 4 test strip my pool is well balanced PH etc are all spot on. After a very long and heavy weak of rain some dark greyish stains started appearing on the bottom of the liner. Brushing didn't help, shocking didn't seem to help.
I tried to ID the stain but it didn't seem to fit into any category I could find so I tried both Organic and Metal stain remover. Neither seemed to help.
Wondering if someone could guide me in the proper way to get this resolved.
Pictures attached but it doesn't come through very well although the color looks accurate on my screen.
Thanks in advance!