HyperSorbª is a synthetic adsorbent that outperforms all other blended synthetic media and carbons. It has exceptional organic removal capacity: it removes organic waste, toxic vapors and other pollutants. In freshwater it will help stabilize the ionic balance and will help control ammonia, nitrite, and nitrate. It is easily regenerated with household bleach. Marine and freshwater. This product is sold by volume. Cited weight is minimal weight.DIRECTIONS: Use one bag for each 120 L (30 US gallons). Rinse before use. Exhaustion is indicated by a pronounced discoloration of the beads from yellow to deep brown. For best results, HyperSorbª 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. REGENERATION: Soak in a 1:1 bleach:water solution for 24 hours in a non-metalic container in a well ventilated area and away from children. Rinse well, then soak for 8 hours with a solution containing 2 tablespoons of ChlorGuardª, Primeª, or equivalent dechlorinator per cup of water. Rinse well. For freshwater use, soak for 4 hours with a solution containing 1 tablespoon of buffer per cup of water (Discus Bufferª, Neutral Regulatorª, or Acid Bufferª). Original color and full activity should now be restored and HyperSorbª is ready for reuse. Caution: some slime coat products may permanently foul HyperSorbª and render regeneration difficult. Do not reuse if odor of chlorine is detectab - UPC: 116015509