Betta Fish: Betta don’t want no one else in tank lmao

My betta Smokey has gotten upgraded to his 20g long tank mostly because his previous tank 29g had pest snails and they caused him waaaaay too much stress. He was angry for the most part of the day. I did my best to move them out but that tank was just riddled with them despite little to no feedings and being heavily planted. So I just made him a new tank, cycled it and wanted to put pygmy corydoras with him. That was a hell to the no lol he literally scours every hiding spot and square inch of the tank lol he wants no one else in. Since I've ensured he's the only one in the tank he's been making huge bubble nests. He swims every inch and even plays in the underground hideout. So idk how yall do it but smokey wants the tank to himself 😆 love this fiesty guy. He flares and dances for me when I get home and let's me feed him by hand. He's my baby.