I have a 5 gallon and a 20 gallon aquarium available for bettas. I also want to keep 4 corydoras in the 20 gallon with my bettas. Right now I have a male and female betta living in small cages but they are going to move into the bigger ones soon.
Option 1) this was my original plan:
20 gallon- 4 cories, 1 male HM betta
5 gallon- 1 female CT (she's about 1in long with fins so I figured she would do better in the 5 gallon.)
20 gallon- 7-8 female betta sorority, 4 cory cats
5 gallon- male HM betta
I like option 2 because I can get more bettas this way. However, I don't want my male feel squished in the 5 gallon since he is a lot bigger than my female. He is currently in a 10 gallon, but I need that for my african clawed frog so he has to move. I don't want him to feel sad and cramped if I downgrade him to a 5 gallon. Also, will my female be happier in a 5 gallon on her own or with a sorority? Finally will 7-8 females and 4 cories be overcrowded for a 20 gallon.