A premium synthetic adsorbent that is unlike any other filtration product. It is not a mixture of ion exchangers or adsorbents but a unique macro-porous synthetic polymer that removes soluble and insoluble impurities from water at a rate and capacity that exceeds all others even HyperSorb™ by over 500%. Purigen™; removes proteins nitrites and nitrates ammonia and a broad spectrum of organics yet its impact on trace elements is minimal. It significantly raises redox. It polishes water to unparalleled clarity. Like HyperSorb™ Purigen™ darkens progressively as it exhausts and is easily renewed by treating with household bleach. A 100 mL bag of Purigen™ purifies and polishes up to 100 gallons of water for up to six months. Purigen™ is designed for both marine and freshwater use.