Substrate

Sure

But from my experience, I would use Aragamax or some other super small grain sand /DesktopModules/ActiveForums/themes/_default//emoticons/smile.gif

 

Shaun,
That's a debatable topic.  The same question was asked a while back (well, more specifically about sand vs. crushed coral - the thread can be found here) and the general club consensus was yes...but it really depends on how good you are able to clean it.  A link from Anthony Calfo said no.  So I hope these threads allow you to better research this and make your own call.
--AJ

 

i am going to be moving my 75Gal. at the end of the month.  I have crushed coral right now but have been looking at removing it all and getting some white sand of some kind not realy sure what as of yet.

i better hury up and finish my stand.

 

That was the same conclusion that I came to.  It's a little costly, but not nearly as much as the damage that it could do.
--AJ