Introducing a second clowfish help

We have had a maroon clown fish for the last five years,we bought her as a pair which always fought, so we figure they were both female. Now she has been alone in the tank for several years. We upgraded our tank from fish only to a mixed tank with coral. We've decided to introduce a new gold striped maroon clown fish from the local fish store that's just over an inch long, to the tank. We've isolated the new clown in a seperate floating acrylic container, last night and turned off the lights. Right now it's about 1:00pm and the first clown fish is swimming round and round the new one and really realy working the tank. as if to say it's mine, but not really rushing the fish, and the new clown has still not showed submission. Also, they don't seem to be showing aggression towards eachother, could they have made they're peace in the night? Should I let the gold striped maroon out of it's container to see how they act together? Or should we wait to actually see him roll over and show submission? If the gold striped maroon has been in alone in a tank at the store for an unknown amount of time alone in the tank, is it posssible it has turned female? It's still quite light in colour, especially in comparison to our other clown, and quite small. We are hoping it's still juvenile, male or unsexed?

 

just let em go do their thing. one of two things will happen.

 

I think you should have put the exsisting clown in the container and release the new one. Let the new one roam the tank for a while.