Seachem Cuprisorb 100ml

Use 250 mL for every 600 L (150 US gallons) to remove up to 7,500 mg (12 ppm) of copper. Use in filter media bag such as The Bag™. For best results, CupriSorb™ should be placed so as to maximize the flow of water through it. To remove undetectable substrate leaching copper keep CupriSorb™ in use for at least 2 weeks after copper tests report no copper. Use in a canister filter, chemical filtration module, box filter, or any high flow area of a trickle filter.
Exhaustion is indicated by a pronounced discoloration of the beads to a deep blue black color. Use MultiTest™ Copper to monitor copper. When exhausted, CupriSorb™ may be discarded or regenerated.
REGENERATION: Soak in a non-metal container with 2 cups of water and 1?2 cup of muriatic acid (available with pool supplies: PAY HEED TO WARNINGS on acid container!). This is best done outside and away from children. Soak for 1 hour, rinse well. Repeat as required to restore the original color. Rinse well, add sodium bicarbonate until foaming stops, and rinse again. CupriSorb™ is now ready for reuse. If original color cannot be restored after several acid washes, proceed with rinses and bicarbonate step, then regenerate as HyperSorb™ or Purigen®.