The larger floc particles or solids formed are then removed (water is clarified) in a process called “clarification." There are numerous techniques to clarify water before filtration. The District’s treatment process uses upflow clarifier technology (2) which act as large particle filters, catching the vast majority of larger particles formed as the water flows upward through about five feet of this filter material. The material is pea sized plastic beads varying in size and shape. A small amount of a sticky polymer chemical is added to enhance removal of the formed floc in the upflow clarifier material. With removal of the larger particles, the clarity of the treated water is greatly improved.