Seachem Zeolith

Cleaned up the heavy metals in my quarantine tank faster than I expected, and the ammonia binding is noticeably better than the last brand I tried. My fish settled in without any stress, which is all I care about.

My tank’s copper levels were creeping up after a bad tap-water change, and this stuff pulled them out within a week—the fact it handles both ammonia and heavy metals is a huge win for me. It’s pricey, but the capacity is real, and it works in fresh or saltwater without any fuss.

This stuff yanked the ammonia down to zero within two days after my tank cycled unexpectedly; the water tests finally backed up what the label claims. Even the copper levels dropped, which is a relief with my invertebrates.