Like all coagulants PAC works by extracting and afterwards clumping with each other dissolved, colloidal and suspended make any difference. The resulting floc is then trapped over the filter. This Notice clarifies the applying and dosing charges for the varied diverse grades of polyaluminium chloride being marketed in the UK. https://www.tjcyindustrialchem.com/news/what-is-poly-aluminium-chloride.html