in my 47 gallon vertical i have 12 zebra danio's, 3 gourami's, and 4 pepered cory's. im going to add 3 black kuhli loaches and 2 more pepered cory's. im also adding 2 pretty big angelfish. i may get 4 black kuhli's but idk yet. theirs 2 concerns that i have that im a bit nervous about. im kinda nervous that the angelfish will try and eat the fast danio's but i dont think they will. the big thing is that there would be not enough room at the bottom since its a vertical tank. so i think in the end im going to end up going with the 3 black kuhli's. ill post pics here of whats its like now and this weekend ill post the updated pics of the tank then.