Product Description - Ef-Chlor,Overhead and Underground Water Tank Cleaning and Purification Tablets, Kills 99.99% Bacteria and Viruses from the water, 1 Tablet purifies 4000-5000 L water - Pack of 50 Tablets Product origin - India Key Specifications/Special Features - Ef-Chlor Water purification tablets are safer than iodine tablets and leave virtually no taste in your water. Works in 30 minutes in most water..are effervescent tablets which kill micro-organisms in water to prevent cholera, typhoid, dysentery and other water borne disease Minimum Order Size and Packaging details - " Minimum Order Size: 5000 jars Packing: Jars of 50 tablets"