Seachem Zeolite increases the quality of your water by easily binding ammonia and heavy metals in freshwater or saltwater aquariums. This includes, but is not limited to the removal of lead, copper and zinc. It is a naturally occurring highly-porous mineral; however, it is also unique from other brands as Seachem Zeolite supplements calcium by 10-15 mg/L without increasing the general hardness in freshwater tanks where the ionic strength is low. Removing these harmful toxins allow your fish and plants to effortlessly thrive for a successful hobbyist experience.