[Myka]

Please don't cycle your tank with a fish of any kind! This is incredibly cruel, and causes permanent damage to the fish. Considering most fish we have are stolen from the ocean, this is really a waste of a perfectly good fish! You can cycle your tank simply by adding a chopped up raw cocktail shrimp. Maybe half the shrimp since your tank is smaller. This will cycle your tank as good as any fish could, and much more eco-friendly.

Having said that, your tank looks great so far! I would also advise against buying pretty much any damsel or chromis. Most damsels will change color into much less eye-catching shades (to say it nicely), and turn into devil's spawn when they get bigger. Chromis aren't much better for attitude, but not as bad as damsels. I have seen large damsels patrolling 100 gallon tanks, and killing every other fish added to the tank. They really can be downright mean! If you're really set on the bright blue color, Blue Chromis (different than the typical Blue Green Chromis) would be a better option although tougher to find. Since this is your first saltwater tank, you may be disappointed in the fewer number of fish you can keep compared to a freshwater tank.

I also love the blue color. I have a Blue Assessor, and although it has quite an attractive color it looks black unless it is under the lights, and is really quite elusive. I just moved him from my 90 into my 20, and am hoping I will see him more.

Another option would be an Orchid Dottyback, although they are bright pinkish-purple rather than blue they are a striking color. Maybe sure you get the Orchid though, not one of the other Dottys as they can be rather aggressive as well, where the Orchid is comparatively docile.