Seachem ZeoliteBinds ammonia and heavy metals Highest ammonia binding capacity of any zeolite Removes harmful metal ions like lead, copper, nickel and zinc Marine & Freshwater Seachem Zeolite is a naturally occurring, highly porous mineral that binds ammonia and heavy metals through an ion exchange mechanism. It has the highest ammonia binding capacity of any available zeolite; ten times higher than some products and twice the capacity of the closest competitor. It