On Dec 8, 11:15 am, "DonC" wrote:
Is your water softened? If so, the stuff you're removing isn't the same as
the typical hard water build up. IIRC, the softener converts calcium
carbonate (hard stuff) to sodium bicarbonate which is flaky when dry but
mushy (thin and soupy?) when wet.

Nobody around here softens their water because the mineral content is
so high a softener would be exhausted almost immediately. Evaporation
forms black rings inside the toilet bowl that won't come off without
chemical help.

A water softener contains cation and anion exchangers that replace
calcium and magnesium with sodium, and carbonates and sulfates with
chloride. Again, because water is scarce here in the Sonoran Desert,
the backwashing needed to regenerate the filter would be an
unconscionable waste.

DB