I bought a bag of sand which I used to make my soil mix for planting both my Drosera seed and Gemma. However I did not realize at the time sand can contain minerals and lime? I was reading a thread that said we should use Silica sand.
How can I tell if the sand I had used is safe? It was sold at a local supermarket in the house plant section and the package states "Sand for soil conditioning" .
Thanks in advance for the help.