Tell me what your thoughts on having the back of an aquarium be a mirror. I was thinking that it would give an illusion of a larger tank, but then I thought it might cause some anxiety for the fish.

What are your thoughts ?

I've seen another member on here that did that! It looked really neat! It made the tank look a lot bigger, and made it look like he had larger schools of fish as well! From what he said, the fish weren't stressed.

You could try putting a small mirror at the back to start and see if it stresses them at all. If it doesn't, then just do the entire back as a mirror.

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36g Bow Front Heavily Planted http://www.aquariumforum.com/gallery...00&ppuser=8981

You can't do it with any territorial fish, as they fail the mirror test - they don't recognize themselves. A Betta splendens can exhaust itself fighting its reflection, and I've seen some Cichlids probably concuss themselves charging mirrors.
Schooling fish would probably be okay. You might not if you look like I do when I feed my fish in the morning though.