I thought that, but as i mentioned, i am just beginning, the Danios are on their way to another aquarium, to fast for my tank. I actually grew up with Bettas as my mother had several aquariums throughout our house. I have yet to see a male attack a female or vice versa, not to say they don't, but my male is quite non aggressive. The female too . The tetra were added and as i mentioned, i plan on getting black neons to school with my neons. The betta housing wasn't intentional, it just ended up that way.
As far as my Plecos, he is tiny and i plan on getting a 50+gallon tank to expand. But i appreciate the input greatly thanks.