xtrstangx
Premium Member
<a href=showthread.php?s=&postid=7446625#post7446625 target=_blank>Originally posted</a> by highquality
what is the vinegar test?
The acetic acid in vinegar dissolves the calcium carbonate (aragonite sand). If it is CaCO3, then it will fizz/bubble. If it is silica, nothing will happen (there may be a little fizzing from inconsistencies in the sand)
IMO, not necesary. Calcium based sand or silica based sands are both fine for a reef tank.