since we lost our little Jasmine.. i was wondering if it would be ok to put the other two back to gether in the original cage them came in?

here is the story.. when we first got all of them in a 30 gal tank, they all played together nicely, then, i believe it was Jasmine who picked on Snow white, so we separated them and put snow white in her own cage.. now, that Jasmine is gone, would it be ok to put them back in the same cage they came in or not? the reason i ask, is because when they are together they play alot and chase one another all over the cage. now they are separated they, sleep, ( which i know is normal)..

so, please help what do i do???