Adding A Black And White Clown?

[bigpete]

I have a 12 gal nano cube dlx with a perc in there already. would they fight if i added a black and white perc? i also have a clown goby and peppermint shrimp

 

[clown123]

yea but then one will become a female and then shoold get along.

 

[bigpete]

so there should be no problems?