So I live in a college dorm with one bathroom for 30-ish people. I hated messing with the gravel, it was so hard to get all the poo and food out of it! So I was like, "You know what? Forget this gravel!" And dumped it all in the trash!
Now it looks a lot nicer and it's a lot easier to clean! The little chunks of a torn up marimo ball give enough ground coverage to keep it from looking barren, but is a lot lower maintenance!