I just opened my pool and noticed that my pool steps and vinyl liner are discolored. The steps and liner are more brownish than usual. Weird thing is that there is a band around the whole pool that is not discolored at all. This includes the steps. In fact on that portion of the steps it looks better than it has ever looked. This band is most obvious on the steps. I am guessing it has to do with organic staining. I have owned the pool 4 years now and every time it is opened there are algae issues. It is actually not as bad this year as the last two because I closed later and opened earlier. I tried to brush it off with no use and also tried magic eraser pad which helped a little. My plan at this point is to take care of the algae issue then balance the water and hope this helps. Is there any thing else I can or should do. Thanks for all your help.