This is a discussion on Accessorizing within the Freshwater and Tropical Fish forums, part of the Freshwater Fish and Aquariums category; -->
Where can I buy a background a little house for my fish tank?...
'Accessorizing' is often the most fun part of setting up a tank.
Backgrounds are sold at most pet stores and can be very beneficial for fish. It provides them with closure, knowing that nothing is coming at them from that side of the tank. If your tank is against a wall then this will end up being purely decorative I suppose. Try and get one that fits with your theme. I once had a river-ish background, which fit nicely with my river-like setup. Then I changed my tank interior and there currently is no background.
As far as shelters go, I find that almost all fish prefer natural shelters. That is, hiding spots produced by the stacking of rocks, the placement of driftwood, plants, etc.. I have two artificial caves and almost no fish have settled in them. They're all concentrated around the woods and plants. Not to say they won't go in constructs, they will just favor a nice (SECURE and STABLE) stacking of wood or rocks to a plastic house.