Seachem Purigen; 250 ml.
Purigen is designed for both marine and freshwater use.
Use into all type of aquarium filters.
Reduce ammonium and nitrite, removes sludge,green algae,hair algae pollutants and reduce water change frequency up to months.
Premium synthetic adsorbent that is unlike any other filtration product.
It is not a mixture of ion exchanges or adsorbents, but a unique
macro-porous synthetic polymer that removes soluble and insoluble impurities from water.