Which is why it should be made up with a large abundance of plants. Looks beautiful when done correctly, and much better for the betta as well. I find it more convenient since I can decorate to my liking (although many argue it should be done as natural as possible)
Which is why I'm very interested in them, lol. Shrimps and snails are usually the most recommended since they tend to be on the peaceful side. Well, shrimps are a maybe. It's a gamble to me, I wouldn't want to do it, lol.