Given time, the polymer residue will settle to the bottom and you can easily pour off most of the clean liquid ... Alum causes coagulation and flocculation so that particles in the water wind ...

Given time, the polymer residue will settle to the bottom and you can easily pour off most of the clean liquid ... the tests were done with pure aluminum sulfate (the right name for alum).

Learn how chemical exposures in water treatment plants can impact your health, and explore practical strategies to stay safe ...