Might want to stock a tougher more durable loach than Clowns. Maybe Synocrossus Helodes or Y. Modesta. I've kept both varieties. The Tiger - Helodes is by far the toughest & most aggressive. The Y. Modesta - Red Tail, IMO, is the line backer of the Botia Loach world.
No matter which loach you choose, a more complex hardscape needs to be constructed as to provide shelter & more natural environment.