Dissolved PAC should be added to the swimming pool as soon as possible. Some swimming pools are added slowly by dosing pumps. In addition to the precipitating agent, the deepwater swimming pool needs more settling time. Polyaluminium chloride will dissolve heat. Generally 5-7 days to use a pool sedimentation agent, affecting water purification effect, so try to get up as soon as possible in the morning. Polyaluminum chloride when used first dissolved in water: 10 times the bucket filled with water. The minimum time required for settling of the flocculant is 6 hours, which usually takes 6-8 hours to completely precipitate. If the swimming pool water deeper need more time, in the water surface, the settling agent settling slower. Therefore, some are directly added to the nozzle, while adding one side of the mixing, the sediment in the floats will float, and then slowly add polyaluminum chloride, the direct effect is better than the pump, but directly add pollution work The amount will be larger .5 or so, because this polyaluminum chloride caking, difficult to disperse and dissolve, the higher the calorific value to prove the better quality. The dosage of 1000 cubic water put 5-10kg. Prior to launching the pool settler, first adjust the pH of the water to 7, or use a pool settler when the pool water is cloudy. In an alkaline environment, it can give full play to its hydroxyl bridging role to speed up the aggregation and settlement, polyaluminum chloride quickly dissolved in water. Can not add water after adding aluminum chloride. Because high pH helps to eliminate the polar molecules in water, so that the suspended particles in water is easy to settle. Normally used pool sedimentation agent (PAC) the most suitable pH range is 7.5 to 8 generally scheduled swimming pool settling agent at night, early in the morning using a manual suction machine sucked sediment. Can not be dragged until late, because the sun is swimming in the pool