Purigen is a premium synthetic adsorbent for the removal of nitrogenous organic waste. Meridian is an all natural oolitic (spherical or egg shaped) aragonite substrate for all reef and marine aquariums. FILTRATION:
FILTRATION: Purigen ranges in color from almost white (cream) to light yellow. Seachem Purigen is not a mixture of ion exchangers or adsorbents, but a Purigen is a premium synthetic adsorbent that is unlike any other