Is it normal to have white flakes in ice cubes or hot water?
Flakes are caused by calcium carbonate and magnesium carbonate precipitates. When hard water is frozen or boiled, the carbonates in the water come out of solution, appearing as whitish flakes and attaching to containers. This calcium is the same as that in dairy products and is harmless. Soft water does not have any calcium or magnesium carbonate deposits, but the use of soft water is not recommended.