River rock in a reef tank?

Hmm that's an idea. You mean like cover it with a lot of glue?

 

Another thing I was thinking off today @ work. You can use "Great Stuff" foam insulation. Once it cures it can be put into a tank, + you can shape it to whatever you want. And if your concerned about chemicals leaching out, you can always coat it with some epoxy (West Systems comes to mind)

 

Not a bad idea gopher.

 

glue some to your back wall or overflow. easy to peel off.

ime with glass its too smoothe if your gonna glue it on. that why the back wall with coralline on it works well. the overflow isnt too smooth where the glue wont adhere.

 

You could always rough up the glass a little bit with some sand paper, if you decide to go that route. Not sure how well it would adhere though

 

hey, they do have glass frag plugs