What is a good substrate to glue to starboard for looks?

[cherubfish pair]

Tank has fiji rock, clown/anem., softies.

 

[Blown 346]

I would think a decent sized araganite would be the best bet since it is a little larger and will hold better.

 

[johnnstacy]

I would not recommend it. The coralline is going to grow over it and it will no longer look like sand anyway.

 

[doody]

Plus it can trap detrious