"I work in the fish room of a pet store, and I actually DO know what I’m talking about.
The bigger the tank, the more stress you will place on your Beta. I have an iPond, and my Male Crowntail Beta, Pinyin absolutely loves it. I only added a layer of gravel two pebbles deep, and I have a fake plant on the bottom. All day long, Pinyin is swimming around the plant, up and down and all around.
The only thing that you have to be careful with is you amonia and nitrite/ nitrate levels, but a weekly water change of 25-50 % of the tank keeps the water clear and clean. I also get my water tested every week to make sure that it’s okay for Pinyin.
He’s way more active at night, when my iPod is plugged in and I have Tokio Hotel playing. It looks like he’s dancing.
I don’t see why everyone’s so upset over it. Just add less gravel then the picture has, and he’ll have a litre of water to swim in and poop in. They’re fine in the iPond."