I picked up 4 Skunk Loaches, since they looked neat and cute. When I got home, I looked them up and they do best in groups of 5 or more to spread out aggression among themselves and should be kept with fast swimming fish. I put them in my densely planted 20g with my Harlequins, which seem to fight back. I still have a Hillstream Loach but the skunks leave him be, since he chased them off. Mostly the skunks go after each other and leave most fish alone. Might add 2 more when theres more at the LFS. I might take the betta out and put him in a different tank.