I just read carefully on the seachem site and found what u said jesse but also sounds like you have to add other chemicals to remove the chlorine and thats it to regenerate it again right....
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 ChlorGuardâ„¢, Primeâ„¢, 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 Bufferâ„¢, Neutral Regulatorâ„¢, or Acid Bufferâ„¢). Original color and full activity should now be restored and Purigenâ„¢ is ready for reuse. Caution: some slime coat products may permanently foul Purigenâ„¢ 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.