CaribSea LifeRock Large Arch 18" Everyone knows that when measuring

Everyone knows that when measuring a fluid it is done by volume

The activated carbons filter particulates and waste while the ion exchange resins help remove nitrogen (ammonia and nitrate) build up which is harmful to your fish

Additionally this has been accomplished while enhancing the colors that make coral beautiful to the human eye

and with added spored bacteria

CupriSorb will remove copper more rapidly and efficiently than carbon and is ideal for emergency copper removal

CaribSea LifeRock Large Arch 18" Everyone knows that when measuringLifeRock Large Arches add open dimension to large marine and reef aquariums with plenty of swim space and area for coral placement. Each Large Arch is 18 inches long and weighs approximately 20 pounds. One arch per box *please do note dimensions and weights varies as these are hand made products. Life Rock is real aragonitic base rock, not cement, no curing. Extensive macro and micro porosity infused with spored bacteria for outstanding biological