hey looks good, unfortunately your hippo tang will not be happy for long, i would seriously consider removing him and taking him back from whre he came. didn't you ask the LFS if you could have him and the size of your tank? did they say it was ok? I would like to know because there is no way that tank can be in that tank for the long term! sorry but the tank does look good!
if you like the fish get a bigger tank!