I know every PB is different (and amount needed for pool), but do you remember roughly how much the luminous blue glass cost?We were going to install Blue Surf Pebble Sheen, but made a last minute change to Prism Blue. We didn't have to pay extra for the swap. But we did pay extra for the Luminous blue glass we added on. So we're looking forward to see what it looks like. We just had the pool plastered today. Tomorrow we acid wash, then begin filling our pool. I guess we'll begin to see tomorrow!