Gray Coast sand 10kg Gray Coast™ Calcite is an all natural calcite substrate for all types of marine, reef and tropical aquaria. Its chemical composition will assist in stabilizing calcium and alkalinity while preventing large pH declines. Unlike competing “wet” gravels, Gray Coast™ is sold dry: this bag contains 35% more gravel than a bag of wet gravel of equal...

Aragonite sand Pearl Beach 3.5kg Pearl Beach™ is an all natural aragonite substrate for all types of marine, reef and tropical aquaria. Its chemical composition will assist in stabilizing calcium and alkalinity while preventing large pH declines. Similar in appearance to Meridian™, it's grain size is considerably more varied. 

Aragonite sand Pearl Beach 10kg Pearl Beach™ is an all natural aragonite substrate for all types of marine, reef and tropical aquaria. Its chemical composition will assist in stabilizing calcium and alkalinity while preventing large pH declines. Similar in appearance to Meridian™, it's grain size is considerably more varied. 

Aragonite sand Meridian 9kg Meridian is a natural oolitic (spherical or egg shaped) aragonite substrate for all reef and marine aquaria. Meridian is the premium aragonite substrate for the reef aquaria. It's grain size (fairly uniform .25 - .50mm) is ideally suited to reef inhabitants. It's chemical composition will assist in stabilizing calcium and alkalinity...