Can U use lime stone as a base rock

[Skeletor]

Since Limestone is primarily composed of calcite and is essentially calcium carbonate (CaCO3), it should be no harm in adding it to your tank (considering Limestone is ancient sea floor). The aragonite reef sand many reefers use is a polymorph of calcite (same chemistry, different structure).

 

[Daniel62]

The Title says it all I Have some really cool looking pieces, so was just wondering if I could use them Thanks