Seachem Purigen – Premium Synthetic Adsorbent for Crystal-Clear Water

Polish Your Water to Unparalleled Clarity

Hazy, yellowing water and creeping nitrates make even a healthy tank look neglected. Ordinary resins fill up fast and barely touch the organic waste that fuels those problems.

Purigen is a premium synthetic adsorbent unlike any other filtration product. It is a unique macro-porous synthetic polymer that removes soluble and insoluble impurities, controlling ammonia, nitrites and nitrates by capturing the nitrogenous organic waste that releases them. It exceeds competing products by over 500 percent, significantly raises redox, polishes water to unparalleled clarity, and can be renewed with bleach for repeated use in both marine and freshwater.

Purigen reflects the chemistry-first approach that has defined Seachem Laboratories since it was founded in 1979 in Madison, Georgia. Developed in-house by Seachem's own chemists, this regenerable synthetic adsorbent is engineered for exceptionally high organic-capture capacity, so a small volume of media does a large amount of work and can be renewed rather than replaced.

1. Rinse Purigen before use and place it in a fine mesh filter bag such as Seachem's The Bag.
2. Position the bag in your filter flow so all water passes through the media.
3. Watch the beads darken as they exhaust, then regenerate with a bleach solution and reuse.

Give your fish the crystal-clear water they deserve. Add to cart.

What It Does

Purigen removes soluble and insoluble impurities from water and controls ammonia, nitrites and nitrates by removing nitrogenous organic waste. It is the highest capacity organic filtration resin on the market, with an extreme affinity for nitrogenous organics while having minimal impact on trace elements. Its spherical and macroreticular structure gives it microscopic pores that increase usable surface area many times over. It significantly raises redox and polishes water to unparalleled clarity, and darkens progressively as it exhausts.

Directions

Rinse before use. Use in a fine mesh (180 micron or less) filter bag such as Seachem's The Bag. Each 250 mL treats up to 1,000 L (250 US 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-metallic container in a well ventilated area and away from children. Use regular 8.25% hypochlorite household bleach (non-scented, no dyes, do not use a splash-less bleach). Rinse well, then soak for 8 hours with a solution containing 4 tablespoons of Prime, or equivalent dechlorinator per cup of water. Rinse well. For freshwater use, soak for 4 hours with a solution containing 2 tablespoons of buffer per cup of water (Discus Buffer, Neutral Regulator). 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 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.

Available Sizes

100 mL, 250 mL, 500 mL, 1 L, 2 L, 4 L

Why Seachem Purigen

• Targets the source of pollution: it captures nitrogenous organic waste before it breaks down into ammonia, nitrites and nitrates, rather than only reacting to the end products.
• Highest-capacity organic resin: its spherical, macroreticular structure packs microscopic pores that multiply usable surface area, exceeding competing products by over 500 percent.
• Fully regenerable: when the beads darken to dark brown or black, a bleach soak restores original color and full activity so the same media can be reused instead of discarded.
• Filter-friendly and selective: it works in any filter inside a fine mesh bag such as The Bag, with an extreme affinity for organics and minimal impact on trace elements.

Best For

Both marine and freshwater aquariums where the goal is crystal-clear, polished water and controlled nitrogenous waste. Ideal for aquarists who want a high-capacity, renewable resin that raises redox and keeps water visibly clear between water changes.

FAQ

How long does it last, and can I regenerate it? Each 250 mL treats up to 1,000 L (250 US gallons) for up to six months. When the beads discolor to dark brown or black they are exhausted, but Purigen is fully regenerable with a 1:1 bleach:water soak followed by dechlorinator, so it can be reused repeatedly.

Where does it go in my filter? Rinse it, place it in a fine mesh (180 micron or less) bag such as Seachem's The Bag, and position it in your filter so all water flows through the media.

Freshwater or marine? Both. Purigen works in freshwater and marine systems, and can be renewed and reused in either.