I have used clean river sand ...

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I have used clean river sand and charcoal & earthen pot & few drops of liquid chlorine. Storage of Water is copper vessel is also tried.

Rajendrakumar V Saraf, FIE, FIWWA, Chairman
 Viraj Envirozing India Pvt. Ltd
21, Radhakrishna, Near SBI, Paud Road, Pune 41038
Tel 02015433445, 9822186763
 www.virajenvirozing.com