Meridian is the premium aragonite substrate for the reef aquarium. Its grain size (a fairly uniform 0.25 - 0.50mm) is ideally suited to reef and marine aquaria inhabitants.
Simply rinse before use to remove any residual dust. To determine the number of bags required for your aquarium, please note that each bag (9 kg, 20 lbs) occupies a volume of 5,300 cm3 (320 cu. in.). To determine your desired volume multiply tank width by length by desired depth.