Idea for background/cover

[BCOrchidGuy]

Thanks for the ideas, Muck I tried the aragacrete route with my 155 gallon and I must have done something wrong, everything was to brittle to work with. I'd love to make it work as I'd like to make tables but unless someone local can show me what I did wrong I think I'll avoid it.
Moogled, thanks that's a good idea, that may be a better idea than the one I had. I could zip tie smaller bits of rock all over.
Kwirky thanks I'll be looking at that tomorrow.

Doug