Main characteristic of ground water sources in Maharashtra is hardness. In this case water sample from sangli (ashta) used. This hardness produces bad/adverse effects on water pipes, boilers and soap consumption therefore several methods have been used to remove the hardness from hard water .one of the recent trends in this regard is to convert soluble impurities into insoluble impurities. Hardness can be removed from hard water by using calcium carbonate crystalline water reactor. The chemistry of water softening process is essentially the same as conventional softening process instead of precipitation of calcium carbonate which does not have any useful consumption And must be removed once in a while somehow crystallization process .in this process reactor produces pure solid grain of calcium impurities. in this process generally the water is taking in reactor 30 l/hr and water hardness ranging from 100-500 ppm with the additional of caustic soda and lime, lime milk was fed to system, in this process the filter bed is made from charcoal of coconut of shell which plays significant roll .the formation of white crystals on the surface charcoal represent the reduction of hardness.
