Your tank looks great. But I am worried you may have some trouble with the Tinfoil barb. The Tinfoil barb is a schooling fish and is best kept in groups of 6 or more. But before you run out and buy your Barb a few buddies, you should know that they will each grow to be about 14" long.
If you have a tank that is big enough to house 6 of these 14" guy's they are wonderful, friendly, active fish. They will eat out of your hand and brush up against your hand/arm when your inside cleaning their tank. Their incredibly shiny silver bodies reflect the colors around them. They are very fast swimmers that can jump out of the tank easily (have a good lid), so a long (72"), narrow tank works best.