We have 4 Bettas in containers (Less than 2gals). We wanted to put my Male Veiltail and 2 Female Veiltails in the fixed 10gal. It'll be heavily planted (With real and fake plants) and there'll be plenty of hiding places. I'm just trying to get all the Bettas out of bowls. The tank won't be cycled (I may buy Safe Start) and it won't be heated. I'll add enough live plants to hopefully suck up some of the ammonia in the tank. It may be a Walstad (Dirted) tank. I'll have to do 40% water changes for a month (Then it should be cycled). By 2 months from now I should be able to buy the test kit, heater, etc.
The real question is, will the male and 2 Females be okay in the 10gal? I've heard of people doing it but I just wanted to know if it's okay.