The alkalinity on the report was 238.95 ppm...

The particles showed up before I started my air for the year...But with the wind action I have been receiving this year I don't know?..

The jar was a 1/2 gallon canning jar that I left outside on the sitting wall of my patio...They only settlement I see in the jar is a little bit of green, not much at all..

I will try and round up some Alum and do as you have asked with the jar or bucket test..