I think I did answer a ...

I think I did answer a similar question or maybe a similar discussion thread! Sand and debri has to be physically removed, manually. Vedic Sciences (from ancient times in India) do not follow the same concept and approaches. Guruvani white developed by Swami Valmiki Sreenivasa Ayyangarya in milligram size quntities is kept in continuous contact inside the tank by dangling it in a porous packaging of thin cloth with an outer layer of plastic mesh and weighted down with a small stone, to make it sink deep into the tank. Cotton thread hangs it with sufficient leangth to make contact at as low water level as possible.Guruvani White is actually an internal medicine and is brittle and hence all this packaging to make it last as lomg as possible .Its action can be called as that of a Bio catalyst, although its principles baed on vedic sciences differ. It is available in small quantities at present .Its testing and validation needs to follow protocol established by the scientist himself, as there may not be  available, enogh expertise to evaluate it! However reduction in TDS BOD, COD can be measured, but water chemical test results may be erratic, and hence the neeed to establish proper protocols with the inventor.What is relevant is that it has been tried out successfully in large scale commercial applications with consistent results, provided prescribed application procedures are strictly adhered to.the water becomes safe enough for drinking, cooking,bathing and toliet flush. Some uploaded files may please be refrred to.