Seachem Cuprisorb 250ml

CupriSorb™ is a powerful adsorbent of copper and heavy metals. CupriSorb™  will remove copper more rapidly and efficiently than carbon and is thus ideal for emergency copper removal. It extracts all types of copper from water and, if in continuous use, from the gravel/substrate bed as well. CupriSorb™ will allow maintenance of invertebrates in copper-treated tanks by removing copper leaching from substrates.

Competing products are not chelating products, but merely cation exchange resins. Such resins can remove copper from freshwater but are ineffective in saltwater.