Its been about 6 months since pool build. We noticed our pebble sheen was streaking and changing after the first month. The pool guys said its normal and will go through a curing process. The pebble tec guy placed the hose in and made sure we filled from the deep end up to avoid any run marks but the main streaks go nearly the length of the pool. They have grown larger over the months changing mainly from a darker to lighter blue. Im fine with either color but would prefer all one color. I was just curious if this is a normal process?Our chemicals have been perfect and I have printouts to back this up. The pebble tec guys told me this was needed to keep the warranty intact.