I'm fairly new here (though not completely new, but I had to change my username so I look really new:)), but I've read all the stickies, i think.
I have a lot of bettas in different aquariums- all of them in no less than 5gal swimming space each. None of them live together undivided (I did try sorority life with 6 girls but divided them for different reasons). There are no other types of fish or snails with my bettas.
There seem to be a lot of opinions out there and on here re: whether bettas should be completely alone, alone but next to each other, in divided tanks, boy with girl, never boy with girl in same tank, etc.
Mine seem to be happy... and they all have dif personalities. And some are alone, some are divided. Most in divided are male and male. But I do have 2 tanks with 'couples' that do spend a lot of time with each other at the divider but don't appear stressed. And some of my fish quite frankly appear depressed and less active if I remove their tankmate.
So, is it just individual betta preference? Or am I 'depriving' my loners by keeping them away from other bettas? Am I subjecting my females to 'egglock' since they are with males and thus hormones are present?