Ok, I purchased a house with an existing pool, I've never owned a pool but was told I need to replaster it. I had that done and over the course of the last year it just gets more and more stains. It's a saltwater pool and I have tried to maintain it myself so I take full responsability for not doing as good of a job as I should. That being said I still have stains I would like to get rid of, but I'm not sure what's causing it. I will attach some pictures I took. I do a much better job of maintaning the chemicals than I have in the past and I get the chemestry checked almost weekly. So I don't think that is a problem anymore.
Thanks in advance for any advice!!