middle occlusion column has white particles moving in it's cloudy water.
top occlusion column is developing well and has white particles right at the top of the mud, its water is the least cloudy one among 4 columns.
bottom occlusion column has the darkest water and almost no white particles in it.
control column's water is light-green-translucent, and white is developing very well on the mud surface.
Distinct layers forming. Sulfur/oxygen gradient beginning to form? Layer at bottom densest, thick with dirt.
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