Ok guys I need help. I need to know if my one gallon tank is sufficient housing for my male betta. He has a heater and filter and he has nice decor, he has a fake sea anenamoe, small rock cave, and a large blue plant. He seems happy and active but every I look people are saying different things. Some say its big enough, some say they need a two gallon, some say the need a five.

he's made bubble nests before and like I said seems very happy and healthy. I even bought him this cute little leaf hammock that attaches to the side of the tank. It's soft and he loves to rest on it and he even blew a few bubbles underneath it. His tank is cleaned once a month and I check the everything out a couple times a week to make sure everything's working. But anyways back to my original question, is he in a big enough tank?