I've been looking for something to hide the filter in my new betta's tank
Wait, there's a filter hidden in that picture? If so, a congratulations to you; I see nothing. I'm also surprised to see those leaves have sunk. Are they buried in the substrate?
As an aside, is the hole on the bottom of that pot sealed? I ask because bettas are notorious for getting their heads stuck in them which, obviously, is something I wouldn't want you to have to deal with. If it's open, you might want to pick up some aquarium sealant. Or a cork.