catcher Posted June 18, 2004 Share Posted June 18, 2004 I've been able to locate a supplier of limestone sand to use as substrate. He said it is about 98% calcium carbonate and 2% silica, is the silica a problem? cheers glenn Link to comment Share on other sites More sharing options...
anchar Posted June 18, 2004 Share Posted June 18, 2004 Hi Glenn, I use lime sand in many of my tanks...the only danger is breathing in the very fine particles whilst dry....silica is safe to fish...but not humans if inhaled. merjo Link to comment Share on other sites More sharing options...
Barca888 Posted June 18, 2004 Share Posted June 18, 2004 Is limestone sand that stuff with mostly fine white granules and a black spec here and there? Link to comment Share on other sites More sharing options...
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