HyperSorb™ 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. DIRECTIONS: Use in a filter bag. Each 250 mL treats up to 300 L (75 gallons*). Rinse before use. Exhaustion is indicated by a pronounced discoloration of the beads from yellow to deep brown. 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 ChlorGuard™, Prime™, 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 Buffer™, Neutral Regulator™, or Acid Buffer™). Original color and full activity should now be restored and HyperSorb™ is ready for reuse. Caution: some slime coat products may permanently foul HyperSorb™ and render regeneration difficult. Do not reuse if odor of chlorine is detectable. In case of doubt, soak beads in small quantity of water and test for residual chlorine with a chlorine test kit.