There have been a lot of posts in the stain section on the Pool Forum this year about plaster pools getting scale over the winter . It seems that some dirt has gotten encapsulated by the scale, causing stains. Some of the pools are new, and others have not had a problem before with this. They all have mesh covers. I live in Northeast Pa and have a fiberglass pool - I have always opened to very low ph in the spring - this year my ph was above 8. I though it strange at the time, but chalked it up to the fact that my pool was a pond - we had so much rain this year, and my pool actually overflowed and had to be drained down. Then all those hot days.... I wasn't sure where to post this, but was wondering if many others noticed a higher than usual ph on opening this year?