I agree, they are all much to small.Try and get the biggest tank you can, the bigger the better.Bigger tanks allow for happier Bettas, they are easier to decorate as you have more room to style.. but the most important is that the water quality and temp is stable and well. The larger the tank, the less water changes you will have to do as it spreads around. :))
Oh, how is your Oscar going by the way?
My oscar is much better he seems very happy since we bought him his big tank :DGood advice BTW Thank you sooooo much for all of your help that you have given me
Great to hear about your Oscar.You're welcome, I'm sure you would help me too. :))