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Ok I stoped by my dealer today to get and up date on my delivery and saw that one of thier spas had a white mineral line on the shell it was a dark blue shell I asked him about that he said that happens on the darker colored shells. now I am worried was I not told something or should I know something.Please advise.
Another possible explaination for the line in showrooms is evaporation, something that will not happen nearly as much in your backyard.We keep the cover off the spa for 8-10 hours a day in the showroom. Calcium may remain on the acrylic as the water evaporates.