[QUOTE=West Basin;48781]"The sun helps settle the sand that is clouding the water." ???

I had an old Geology Professor who taught at BGSU tell me that when I was in my teens. He explained that a hot bright sun warmed the water around the individual sand particals at a different rate than the sand particals themselves, helping the two separate allowing the sand to fall back to the bottom much faster than if they remained at approximately the same temperature. He went on to explain the water was supporting the sand in suspension and water actually contracts some as it warms and expands as it becomes colder due to the different gases that make up the chemical formula for water. I never questioned his statement and thru obsevation over the years his statement seem to be correct, at least about the water clarity part of it. I hope that heips with your question the question marks implied!