Betta Fish: My betta

This is my plakat male koi betta. I got him 3 days ago and I really love him. He was imported from Indonesia to the fish shop. Then I got him the same day he arrived to the fish shop. Poor fish was probably tired from going to one tank to another. But anyway, he’s very active and healthy. (Don’t mind the filter I have to clean it, some moss got stuck on the guard). Tank is 20 gallons.