stain pic and teat strip results

Hi all, I have a relatively new pool owner. Have had it for about 2 years. I do my own chemistry and up until last year (2023) my pool was perfectly fine. This last winter the pool got a bit more dirtier than usual and upon opening this summer I have had a many issues and have spent more money...

Hi I have an above ground pool and have a stain on the floor liner that will not go away. I have been trying everything and even went to the local pool store. Sequence of events: Opened my pool and vacuumed it and notice a brownish stain. Tried brushing, no luck. Tried Shock, no luck Tried...