For the record, I have 2 bettas living each in a 1 gallon tank of their own. Glass houses, right?
They are happy and healthy but I have to do 100% weekly WCs which is getting old. Brad is going into a 10 gallon next week with 5 guppies, and Finty will be getting something bigger soon. At least 2.5 gallons all to himself with a snail or something.