Purigen��_ is 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 by over 500%. Purigen��_ controls ammonia, nitrites and nitrates by removing nitrogenous organic waste that would otherwise release these harmful compounds. Purigen��s��_ impact on trace elements is minimal. It significantly raises redox. It polishes water to unparalleled clarity. Purigen��_ darkens progressively as it exhausts, and is easily renewed by treating with bleach. Purigen��_ is designed for both marine and freshwater use. This product is sold by volume. Cited weight is minimal weight.DIRECTIONS: Rinse before use. Use in a fine mesh filter bag. Each 1 L treats up to 4,000�ĕ�_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. For freshwater use, soak for 4 hours with a solution containing 1 tablespoon of buffer per cup of water (Discus Buffer��_, Neutral Regulator��_, or Acid Buffer��_). 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 c SELECTIVITY: Seachem Purigen is an organic filtration resin that works hard to remove nitrogenous compounds and waste produced by fish, corals, and even plants, making your water crystal clear.. CAPACITY: Being both spherical and macroreticular, Seachem Purigen has microscopic pores that increase its usable surface area to many times that of a purely spherical resin.. REGENERATION: Once Seachem��_s Purigen is exhausted, it can be regenerated with a solution of bleach and water. The bleach will literally ��_burn off��_ the organics that have been removed from the tank.. SAFETY: Some slime coat products may permanently foul Purigen and render regeneration difficult. Do not reuse if odor of bleach/chlorine is detectable. In case of doubt, soak beads in small quantity of water and test for residual chlorine with a chlorine test kit.. Age range description: All Stages