FAQ: Does Seachem Matrix™ exhaust, expire, or need to be replaced?

No, when cared for properly Matrix™ will never expire or need to be replaced.  We recommend to give Matrix™ a quick rinse in old tank water as a part of your usual filter maintenance.  It is possible for Matrix™ to become impacted with detritus over time, reducing flow and capacity.  In this case, it will require a thorough rinsing to restore it to full capacity.