thanks for the pics showing the alum effects. looks good!

basic question- how does the alum work? it looks like it causes the suspended particles in the pond to precipitation out and settle to the bottom. maybe?

does the alum effect certain particulates more than others? are there situations of a murky pond where alum would not help?

fwiw-adding aeration to my pond seems to have clarified the water, makes it appear more of a deep blue color.

thanks for the write-up, good luck
adam