Betta Tank Setup Ideas for Beginners. Our Betta Fish Tank Setup at the Fish Store. Betta Fish are often kept in a Small Aquarium but that's not good. This Betta Tank Setup is, in my opinion, one of the Best Betta Fish Tank Setups ever. The design of this Aquarium is cool and the Betta Fish seems to love the Betta Tank Setup! We are going to add a Betta Fish to the other Betta Tank as well probably! | Danny's Aquariums