About the background issue, here is what I do.
Take the background off and wipe it down with a wet sponge. The water will "adhere" the background to your tank. Tape one side down to the glass then, using a credit card or something similar, work the bubbles out toward the side that isn't taped. By removing the air, the water and air kind of create a vacuum of sorts that will keep the BG looking pretty. Once you have all the bubbles worked out with the credit card, tape the other side down to the glass as tightly as possible.
FYI, this is a lot easier to do BEFORE the tank is filled, which I found out the hard way!!! By, with a ten gallon, you should be alright. In my 55 the BG is super dark because I forgot to put it on before I filled the tank and I can't get behind it
Hope this helps. I also hear that this same process can be accomplished using vasoline, but aside from it sounding like a huge mess, I'm not sure if something harmful would leech thru the glass and harm the fish. Water works great.