FAQ: I am afraid of heavy metals building up in my tank. Can I leave Seachem CupriSorb™ in my filter permanently?

It is fine to leave CupriSorb™ in your filter for an extended period of time if you are afraid that there is some source of heavy metals leaching into your water. However, many heavy metals are actually essential to the health of fish, corals, and invertebrates in trace amounts. Leaving CupriSorb™ in your filter may eventually deplete these essential trace elements completely, so we do not recommend CupriSorb™ as a permanent addition to your filter.