Seachem Purigen, 500 ml, is a premium synthetic adsorbent that is unlike any other aquarium filtration product that controls ammonia, nitrites and nitrates. 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 by over 500%. Purigen controls ammonia, nitrites and nitrates by removing nitrogenous organic waste that would otherwise release these harmful compounds.

• Purigen Fact Sheet (Seachem Web site)
• For freshwater & saltwater aquariums
• Purigen controls ammonia, nitrites and nitrates
• Purigen’s impact on trace elements is minimal
• Polishes water
• 500 ml treats 500 gallons
• Purigen darkens progressively as it exhausts, and is easily renewed by treating with bleach

Rinse before use. Use in a fine mesh filter bag. Each 1 L treats up to 4,000 L (1,000 gallons) for up to six months. Exhaustion is indicated by a pronounced discoloration of the beads to dark brown or black.Regeneration: Soak in a 1:1 bleach:water solution for 24 hours in a non-metalic container in a well ventilated area and away from children. Rinse well, then soak for 8 hours with a solution containing 2 tablespoons of ChlorGuard, Prime, or equivalent dechlorinator per cup of water. Rinse well. Original color and full activity should now be restored and Purigen is ready for reuse. Caution: some slime coat products may permanently foul Purigen and render regeneration difficult. Do not reuse if odor of chlorine is detectable. In case of doubt, soak beads in small quantity of water and test for residual chlorine with a chlorine test kit.