Hey! No hating from my side. I lived in a dorm for a year and our dorms felt like a prison cell (not a lot of space for large tanks). I owned 4 Bettas (2 Crowntail Males, 1 Veintail Male and 1 (Unknown Breed) Female) each in one gallon tanks without filtration or heaters, but each one of them survived and seemed rather content (until my mother decided my cousins each needed a Betta and they didn't survive a month outside of my care -.-).
But welcome to the site! I've recently came on here as well and it has been extremely helpful and beneficial!(:
And I also agree with waterdog, I bet you take exceptionally good care of Tristan and that's what counts!(: