I have owned singles and clowns already paired up in the past. This time around I picked up a couple of non-paired Gold Lightning Clowns almost 2 weeks ago. One is noticably larger than the other. Naturally the larger seems to chase the smaller one quite a bit, then they seem to swim close to each other for awhile, then it's back to chasing. The smaller ones fins have some nipping marks but nothing extreame (only 2 fish in a 144 so getting away is easy). How long will this activity usually go on before they pair up? I know there is always that chance they won't. But on average?