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Re: Help with yellowing plaster in the bottome 6 inches of s Thanks, I'll get some vitiman C & give that a try this weekend. Cheers

Our pool and spa are less than 1 year old. The plaster is cody pebble and I recently noticed that the bottom 6 inches of the side wall in the spa is yellowish. We had an issue with an electronic valve that drained the spa briefly last week so I poured bleach along the yellow ring prior to...