I really like your idea of a darker color under water and the benefits it could bring. My last liner patterns and colors bleached completely out to a very light blue over just 4 or 5 summers. I'm not sure if that is normal or not for these things. I am only 4 years into ownership of my first pool. Maybe WaterMom can shed some light on this, I would love to here her thought on your ideas. Also maybe we will get PoolDoc to join in this topic on a source and brand of good liner options that will also benefit the website !