I am wondering if anyone is keeping stats on what colors/patterns/brands of liners bleach rapidly. Our pool has been operational for 3.5 years, and we are noticing that our dark-blue-mottled-with-black liner is starting to bleach from the water line down. It looks like only the blue is affected (wonder if we'll end up with a leopard print pool!) and there is the same amount of bleaching on the shady side of the pool as the full sun all day side. Anyone have any comments?