... brown powder, the products conform to the tap water standard. English name: Poly aluminium chloride(PAC ... Wide application, and adaptable to most kinds of water. Easy to quickly shape big alum fume, ... optimum input through tests according to different raw water turbidity, change of seasons, and the shapes ... be 3-5%aqueous solution. The higher turbidity of the raw water, the thinner solution is mixed. Thus, ...