Tomato Clown Addition, Early or Wait?

[Megability]

Setting up a new 165 gallon and want to move my 12 year old Tomato clown over from a BioCube29, give him a new home but should I wait in case he gets territorial to any future fish, or is 165 gallons enough room where he won’t care??

Thanks!

 

[DeniseAndy]

Wait. And if it is the only one, it is a female.