Has anyone collected and tested simultaneous samples of a still pool, one from the top and one from the bottom? If so, we could answer the question of whether cyanuric acid is evenly distributed or settles near the top or bottom of the pool.
If we knew where CYA collected, we could more efficiently drain our pools to remove excess quantities.
Here are some relevant molecular molar masses:
18 g/mol Water (H2O)
58 g/mol Salt (NaCl)
111 g/mol CalciumChloride (CaCl2)
129 g/mol Cyanuric Acid (C3H3N3O3)
232 g/mol Trichloroisocyanuric acid (C3ClN3O3)
So if cyanuric acid is more than 7 times heavier than water, it should exist in higher concentrations at the bottom of the pool provided there is sufficiently low turbulence. But even absent turbulence, diffusion competes with gravity, so the question is whether gravity is able to make a meaningful difference.
I am considering setting a sample collector at the bottom of the pool right-side up and one at the top of the pool upside down, leaving it over night, then stealthily capping the lids first thing in the morning and testing both. Has anyone already done this?