clownfish ?

I have had a pair of Ocellaris Clownfish for 9 months and got them when they were babies now they are a pair. I got two black ice babies from ac&c that I plan to put in a new frag tank but for now I put them in my display tank with the ocellaris clownfish. I separated them with egg crate to introduce them in my DT but the black ice swam out cause they were too small so I added some plastic mess to the inside of the egg crate. After a few days I mixed them together with my orginal pair and the first night and day were a little rough. They did not get along well but after two days they all got along well. I have had them for two weeks and things are good but concerned the two baby black ice won't pair up if they are mixed with my original pair. am I confusing all the clownfish by mixing them? I think I might put the black ice back in the egg crate box until they pair up. The egg crate box in my DT is only 9 x 7 is this too small to keep them in for a couple weeks?

 

Lost track of days the ice have only been in my system for a week now

 

Thanks for the advice, should have them in my frag tank soon.