Planning for big balas.
 

Alrighty. So I'm well aware that my 2 to 3 inch balas will outgrow their 20gal habitat, but so I can start planning and saving now - what is the ideal tank size for 3-6 full grown balas? I *really* want to make sure all of my fish are provided the best habitats and given enough room to be happy and healthy -the last thing I want to see is these guys suffer in a cramped aquarium. Any advice/suggestions would be greatly appreciated and thank you in advance ;)

I dunno if this is overkill, but I'd say 100+ gallons. :D