Just found this site....I love the tank, I have 2 and am ordering at least one more. I got one used when it was still called Aquatic Gardens Bookshelf aquarium and my newer one is Petco's. Same thing but the AG one had come with some small plants, backing and different way to switch the light fixture on. Petco's has better fixture switch in my opinion.
I have a small colony of Neolamprologus multifasciatus (shell dwelling cichlids) in one and about 25 of their fry in my second. I love the footprint of this tank and the height is great for the shellies who spend so much time in their shells anyhow.
I use a 25w heater in it but do think those mini 7.5w that are sold for Bettas would work fine and be less obvious in the tank as well. I also wasn't too keen on the filter since I prefer using AquaClears and their media, so have their Mini in the tank.
The decor I'm using is black & white sand and 2 small resin rock formations and of course the shells for hiding/breeding.
I'm thinking to use the other tanks I'm hoping to order for a colony of Galaxy Rasboras and some easy to keep live plants and another for a trio of tiger mickey mouse platies.
I know this post is old but thought I'd add some other options for fish in case others find this thread.
If anyone reads the Amazon reviews, don't fill tank to the rim as it has tendency to leak, siliconing black top trim will fix it, I just don't fill it to the top.