I think it would be a lot to have a tank custom made. A regular 20g works just fine. 
That sounds like a good plan. Flaring is ok, my girls still do it sometimes. After a few days it'll die down though. After that time, if some girls are still attacking the others, you'll want to take them out though

That sounds like a good plan. Flaring is ok, my girls still do it sometimes. After a few days it'll die down though. After that time, if some girls are still attacking the others, you'll want to take them out though
