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If you still have your PolarPur bottle you can purchase crystal iodine off of ebay. Look for this seller, "ibmsuccess2010", he sells and ships from Lithuania. I place a quarter teaspoon of the iodine back into the PolarPur bottle and it will work like new. The seller packages and ships very discreetly. The amount if crystal iodine you will get will probably ...

Distillation Boiling alone will leave most contaminants in the water, such as heavy metals, hydrocarbons, etc... multi-stage distillation will both kill pathogens and leave most contaminants in the residue. Distillation can be carried out using a solar still if a fire and appropriate equipment isn't available. One stage distillation is usually enough ...