what else do you have in ther besides the angel? the angelfish will grow too big for your tank i'm afraid, and if thats a neon i see its the angelfish's natrual diet so keep an eye out
I think adding sand and spcing the plants out a bit better will make the tank look much better. Also I hope you know that you will need to get a bugger tank for the angel.
tht angel is far to big for the tank, id rehom him and get some smaller fish. bu i term of sprucing up your tank sand, plants, bogwood will make it look 100% better.