Our pool is 3.5 years old and soon after completion developed several long cracks inside. After that, white gunk started coming through the cracks. Additionally, the mosaic tiles we used on top of and down the huge back side of the infinity wall falls off in patches. Periodically our pool company comes and cleans off large white stains on the outside tiled wall as well. I feel the three are related and I did get an opinion from a pool cleaner. Ideas?