Chemicals for use in the treatment of water, namely, potable and non-potable water, grey water, environmental drainage water, industrial wastewater, and sewage wastewater; Chemicals for use in the treatment of water, namely, a mixture of alum and magnesium hydroxide for removing phosphorus from water, namely, potable and non-potable water, grey water, environmental drainage water, industrial wastewater, and sewage wastewater; Chemicals, namely, alum and magnesium hydroxide and mixtures of alu...