OK here's the scenario. I have an aviary W100 x H71 x D35 inches with 13 zebra finches in it. Two are parents, and the other 11 are their offspring over a few clutches. Since the last clutch have all fledged I have removed all nests as I don't want them to breed anymore, let alone start having siblings inbreeding! 13 birds is enough for now!
It is now spring and since then the birds have all gone berserk! Obviously the fact that is is now spring has likely triggered territorial and breeding behavior in the birds which is causing all the fighting and chasing around. I don't have any other cages to remove or separate the birds.
The question now is how can I discourage or minimize their fighting? I have seen topics that say try supplying more perches at different levels, put multiple food and water dishes, etc etc, but this has not had any positive effect in my case. At the moment I've got multiple perches in there but all at different levels. This is what it looks like:
One end

The other end

Would perhaps multiple perches at the SAME LEVEL do the trick to stop them fighting?
I read somewhere that said squirting the aggressors with a water gun will stop the fighting but I can't stand out there all day just to squirt them when they fight??
Looking for some fresh and definitive solutions to my problem, please!
Thanks in advance...