Looks like great idea to me. The only thing that pops to mind is someone mentioning bottom dweller infection from glass bottom bacteria. But I haven't researched it just something I heard on some post. For a moment there I thought it was going to be a textured layer on the inside bottom made of resin filled sand.
I am not a huge fan off simulations of things that are not in the tank (poster backgrounds, mirror backgrounds, etc.), but that actually looks pretty darn good. I might try that eventually.