I remember my first big aquarium and all the colorful fish in motion...better than watching TV!
I fell in love with siamese fighting fish---Bettas were so lovely to look at but had to be separate from all the others.
Someone came up with a betta barracks!
A little plastic bin that attached to the top front on the aquarium
and allowed for several bettas to be visible to all - including each other
so a little flaring was possible.