Seachem Meridian

Seachem Meridian

Seachem Meridian is an all 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 (a fairly uniform 0.25 – 0.50 mm) is ideally suited to reef inhabitants and it’s chemical composition will assist in stabilising calcium and alkalinity while preventing large pH declines.