Oh, and do not under any circumstances buy a Fluval edge, or a Biorb of any size. Almost zero surface area,terrible oxygen exchange as a result, no floorspace, horrific filtration, overpriced... the list is endless....
I really
really want a custom built tank, shallow - 8 inches deep or so, but about 2.5 feet long and 15 inches wide. Perfect betta tank. I would actually try to get hold of viable rice seeds to grow in the tank if possible to re-create a rice paddy biotope