Seachem Seagel 500ML

You get the best of both worlds with SeaGel because it is a mix of Matrix Carbon and PhosGuard.
MatrixCarbon is an ultracapacity carbon for the removal of organic and color impurities.
PhosGuard is a powerful remover of phosphate, silicate, toxic metals, and acids.
Both components are bead shaped for optimum water flow characteristics and penetration. The components enhance each other and are ideal for reef and marine use.

DIRECTIONS: Use 500 mL for each 300-450 L (80-120 gallons). Rinse in freshwater before use. SeaGel will function 3-4 months.