1g tanks are the respectable minimum for betta fish care, I don't see it being a problem! Some fish PREFER smaller tanks and freak out in larger ones. I'd wait and see how he turns out before deciding on something different.
You'll see through betta fish care that they're very smart creatures and all have amazing personalities.
Although, depending on where you live, you may need a heater. I'm in west Florida, just along the coast, so I don't need them, but if you live up North I'd suggest getting at least a 2.5g tank, because that is the smallest tank that can be safely heated. If you're apart of the deep south like I am, he/she should be fine in this tank!
Good luck!
/EDIT: It looks very nice by the way! I keep mine in 2.5g to 3g tanks, but 1g tanks are perfectly fine. As JBosley said, it's all personal preference.
You'll see through betta fish care that they're very smart creatures and all have amazing personalities.
Although, depending on where you live, you may need a heater. I'm in west Florida, just along the coast, so I don't need them, but if you live up North I'd suggest getting at least a 2.5g tank, because that is the smallest tank that can be safely heated. If you're apart of the deep south like I am, he/she should be fine in this tank!
Good luck!
/EDIT: It looks very nice by the way! I keep mine in 2.5g to 3g tanks, but 1g tanks are perfectly fine. As JBosley said, it's all personal preference.