Newbie - so forgive my ignorance - when buyng the home we had a pool inspeciton and the inspector indicated that it would be time to replaster the pool. It is a white bottom and while there is some staining it is not enough to concern me. Is replastering an aestetic issue or is there something more that failing to take action sooner rather than later would be even more costly? The pool is relatively smooth and no cracks or leaks are evident.
Also in regard to darker colors - do they help raise the temp faster in sunlight?