So I've got my Betta set up in a one gallon carry case that you can get from Walmart that I had at my house. He has a small heater, thermometer and litte filter as well as a little house and a Betta leaf. I had only planned on keeping him on there 2 weeks until I could afford a new bigger tank, I typically keep my Bettas in a 2.5 gallon or bigger when I can. I unfortunately had some unexpected expenses to pay so I can't afford a new tank yet. My question is how long do you think he will be ok in the one gallon until I can get another tank.