Poly Aluminium Chloride PAC Usage: 1. The user can allocate remedy concentration by test and determine the optimum dosage according to different to be added after they are dissolved and diluted. 2. The dilution ratio of liquid product is 5-50% and the dilution ratio of the solid product is 2-20%. 3. The liquid product dosage is 3-40kg/1000 tons of water and solid product dosage is 1-15kg/1000 tons of water. 4. The amount of specific dosing is based on coagulation tests and experiments.