The Exstream® Prefilter™ attaches to the bottom of your ViruStat microbial water purification cartridge. The activated coconut carbon granules reduce pesticides and herbicides while removing sediment & organic contaminants that create unpleasant tastes and odors. A must for extended travel in regions with questionable water quality. Extends the life of the cyst filter & removes impurities that cause unpleasant water taste. |
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