My first tank was black. This new one is blue. I like the blue a lot better. It makes the tank look a lot brighter. After a few months the back is all covered with coralline anyway, so pick whatever you want but remember it won't be exposed for long!
Once you go Black you'll never go back. :shock: Weren't they talking about our backgrounds? :lol: I vote black because it stands out less if you have patches of coralline or happen to scrap it off.