... wastewater.4.Usage and cautionsbefore use, you should test it in beaker to determine the dosage1, dissolved in pond in 20-50% concentration, stirred it ... more cloud, the test rev in beaker is 250-300r/min in 10-30s, the time should be less than 2 minflocculation phase ... break the packing, this product can be preserved in long time.9, This product should be dissolved before use, the dissolved equipment ...