Aluminum sulfate reduces P
in water column and in seals the sediment by binding to P and forming a
precipitated material called �floc� that settles on the bottom.This makes the P unavailable for
algal blooms.
Very effective for internal
loading, which is the largest contributor of P in Togus Pond.Alum is usually applied in concentrated liquid form, which is
scattered from the back of a small boat, as you see here.