Danio pecking order

[dylema]

We have 4 danios is a small tank (don't worry, they will be moving up to a bigger home ASAP). They've been there for about 2 months.
The problem: One danio (Fatty, think she's a girl cos twice as big as the others) is CONSTANTLY chasing/harrassing the other danios. Now I know she thinks she's boss and all but how much longer is this going to continue for? When they go into a bigger tank will she settle down? She's already killed one danio (think he was sickly anyway but still...)

 

[The-Wolf]

this is not a pecking order thing, you have not got enough room or fish. If left in this condition the large danio will kill all other tankmates.
the rest is in my signature.