Clownfish pair fin nipping?

[kzv]

So I bought 2 pretty similar sized ocellaris clowns (1" - 1 1/2") about 1 month ago. Since then 1 has clearly become the dominant one (female I assume), but at the same time it's been consistent nipping at the other, to the point where 1 of the ventral fins was almost completely gone. They've always swam next to each other, but when it gets close to night time, that's when the nipping starts.

 

I've read that nipping is pretty regular, but since it got to that point, I separated the smaller one into a breeder box. The female is never more than 5" away from the box, but will the pairing work? Or should I try another clown?

 

Thanks!

[RIP Sebastian]

Let them do their thing. It's only been a month. It will take them a while to figure it out.

[Clown79]

Female clowns will always bully the male. The nipping should stop but it takes time.