Purigen 100ml

Purigen is a synthetic organic filter resin for aquarists who run freshwater or marine tanks and want chemical filtration that goes beyond ion exchange. It targets dissolved and particulate waste that builds up from fish and invertebrate waste and decaying plant matter.

Why it matters

• The granules have a macroporous structure, so the surface in contact with the water is much larger than on smooth resin beads.
• It captures larger nitrogen-containing organic molecules, which the supplier identifies as the main source of these compounds in an aquarium, rather than simple small molecules.
• The resin changes colour from light to dark brown and then almost black as it loads, giving a visual sign of when it needs replacing or regenerating.
• It can be regenerated by rinsing in a diluted household bleach solution, which the supplier says also removes accumulated organic contaminants that salt-based regeneration does not.

Specifications

• Brand: Seachem
• Product: Purigen, 100 ml
• Form: granular organic filter resin
• Suitable for: freshwater and marine aquariums
• Weight: 0.1 kg
• EAN: 000116016506
• Pre-use: rinse before use
• Packing: pour into a filter bag with fine mesh
• Exhaustion indicator: colour change to dark brown or almost black

What it works with

Purigen fits both freshwater and marine tanks where organic load is a concern, including heavily stocked systems. It is designed to sit in a filter bag within the existing filtration path, alongside mechanical and biological media. The supplier states a usage life of about six months, after which the colour change indicates it is time to replace or regenerate the resin.