How big is the tank? it should be at the very minimum 10G but a 20G is better.
You shuld so some resesrch before starting one as it can be hit or miss. Plus you should also have an extra tank on hand in case one of the girls you pick can't play nice with others.
Basically all you need is a tank, decor and 5 females. However you want the tank to be heavily decorated. The more objects there are in the way to disrupt the line of sight, the easier it is to escape from being chased or bullied.
Once you have the females and tan set up, I float them in cups to acclimate them and then I release them one at a time. Try to release the least agressive one first and most agressive one last. I could never tell so I just released one and then 30 minutes later, released another and so on.
They should explore for a bit and then you may notice they will start to bicker. This is pretty normal but you should keep an eye on them incase the fights get severe. They are establishing a pecking order, just like wolf packs. Some chasing and tail nipping is normal but if any one is getting pretty beat up - remove her ASAP. If one female is being overly aggressive, cup her and let her chill in the cup for awhile and then release her again. Keep an eye out for trouble though.
Some say get all siblings or all the same size/age. I really do not think it matters as I have had juviniles in with Giants.
my 20G with fake plants