So glad I found this amazing resource! We will be adding a spa with an overflow & a tanning shelf, and are replastering with Arctic White Pebble Sheen in April. We like the idea of replacing the baby blue waterline tile with white tile for our mid-century modern home, but were wondering if anyone could share their experience. Is it a good idea, because hides the calcium build-up, which happens quickly here in Palm Springs due to the water being very hard. Or is it a bad idea, because it shows the dust, debris and tanning oils etc. more. Any advice from someone with white tile in a similar environment would be greatly appreciated? TIA