Seachem Purigen Aquarium Filter Media, 250ml

• Purigen is a premium synthetic adsorbent that is unlike any other filtration product.
• Purigen controls ammonia, nitrites and nitrates by removing nitrogenous waste that would otherwise release these harmful compounds.
• Purigen's impact on trace elements is minimal.
• Purigen is designed for both marine and freshwater use.

Selectivity: purigen is the highest capacity filtration resin on the market. No other products can compare to its ability to clear haziness and polish water to unparalleled clarity. Unlike other products on the market which are simple ion-exchange resins, purigen is specifically designed to be an scavenging resin. When ion-exchange resins are filled to capacity by metals and other contaminants, purigen has barely be to reach its potential. Purigen generally ignores simple elemental compounds, having an extreme affinity for nitrogenous s. The primary source of nitrogenous compounds in an aquarium is waste. Fish, corals, even s produce nitrogenous waste. Purigen removes that waste faster and more completely than anything else on the market. Capacity: purigen's possesses enhanced capacity owing to its vast surface area. All other resins on the market are purely spherical extruded beads. These beads remain smooth even under a micro. Purina is both spherical and macroreticular. It has microscopic pores that increase its usable surface area to many times that of a purely spherical resin. Regeneration: purigen can also be regenerated. As it adsorbs waste products, purigen will change color from a pale blonde to a dark brown, almost black. Once it is exhausted, it can be regenerated with a solution of bleach and water. The bleach will literally "burn off" the s that have been removed from the tank. Watch out for products that cl to be regenerable with a brine solution. That is the regeneration procedure for ion-exchange purposes. A brine solution will not remove s. While such resins have a limited capacity for adsorption, a brine regeneration process only replaces removed ionic compounds. It does not destroy large molecules that were removed, which is the primary function of adsorption resins.