Originally posted by Thomas712
Take a sample of your sand and test some of the sand with vinegar. If it bubbles/dissolves, it is calcium carbonate sand and should be safe to use.
How long does it take to dissolve?
I have a 300 gal tank with a 10' toadstool. And I just added a Powder Blue Tang. And he keeps eating my toadstool. Is there anything I can do to make him stop?