Can sandstone be used in a saltwater tank?
>>>Hello Monte, Sure, you can use sandstone. Don’t expect it to transform into true live rock though, it’s much too dense. Also, if you’re talking about a reef tank, or any tank where coralline covered live rock will be introduced, the sandstone itself well become covered in coralline algae eventually. So, might as well just use live rock. If you’re setting up an “old school” fish only tank with no live rock, then coralline algae will not be an issue.
