Hi, we're about 23 days in our 28 day startup period for our pool and I've noticed a pretty significant spot in the deep end where the finish is lighter than the surrounding areas. We had PebbleTec Signature Matrix in Laguna Blue installed (which to me looks waaaay darker than the example photos, so already not too happy) and the area has not gotten any better with daily brushing. If anything it seems to have gotten more obvious. I've raised this with our PB and they said it's on their punchlist to be addressed, but I'm concerned about what the options are to fix it. Would this require draining the pool to fix? What's the potential cause- poor installation, chemical imbalance, etc? Thanks for helping out the newbie!