DIRECTIONS: Use one bag for each 400 L (100 gallons). Rinse before use. Exhaustion is indicated by a pronounced discoloration of the beads from yellow to deep brown. For best results, Purigen should be placed so as to maximize the flow of water through it. It may be used in a canister filter, chemical filtration module, box filter, or any high flow area of a trickle filter.
Seachem Purigen for Freshwater & Saltwater, Treats 100 Gallons, 2.1 oz
Size: 2.1 oz. Gallons Treated: Treats 100 gallons