Pool is 11 months old, white flakes have been collecting at the bottom for the last 3 months and increasing in quantity. Called the builder out this Saturday, cleaned the IC40 again along with the filter and still had flakes Sunday morning. Builder says it's normal and more visible because of the dark bottom pool (Quartzscape). Chemistry is good, adding acid occasionally but everything else seems about right. I'm not buying that this is normal but not sure what the issue is? Thanks in advance.