my sister is going away for college and she gave me her abused betta to take care of (its in one of those 1/4 gallon betta kits, un-heated, un-filtered). all i have available is a roughly 2 gallon vase (i used the vase for growing hornwort so it's got live plants). i can't get it a better home because my parents don't want me to have another fish tank, any tips? (i have a betta in a nice heated, filtered 5.5 gallon tank all to himself, so i know what they require which is why i'm asking for help)