the only problem with adding more aros later is they will be alot smaller
my tank is abit smaller than yours and the aros were fine until they got to 12inch then they were sub adult and all hell broke out
i added 2 x RTG to make the com up to 8 they were still fighting but not as much
i just sold 1 x xback and 1 x rtg and brought a super red their is now 7 x aros in the tank and its much better
you may find the RTG bully the super red
i know you are set on getting 4 x aros but i would truely wait until you have enought cash to add 6 x aros
frank tryed adding 4 x silver aros with 3 x RTG the silver aros just sat and watched the RTG fight it out
you maybe lucky with just 4 aros but in a tank that size i think you are going to have big problem the aro will be able to make territorys and when another aro comes into that territory the other aro will have plenty of room to build up speed and beat up the other aro real bad
your best bet is to put a divider in and cram all the aros into say a 2ft space then increase the space as they grow
i was very lucky with my aros as i didnt pay for them but if i did i would have been crapping myself at times
your aros will look beat up at times it all depends how far you are willing to let it go before you step in and brake it up
i wish you all the best of luck with your aro com it a very nice project and im getting more and more happy with mine as time goes buy
good luck
