An aquarium wall cleaning device is provided. The device may include a first magnetic or magnetically attractable member including a first flexible main body and a first layer attached to the main body and having an abrasive surface, wherein the first member is configured to conform to a curved inner surface of the aquarium wall during use. A second magnetic or magnetically attractable member may be provided which includes a second main body. When the first member and the second member are placed on opposite sides of an aquarium wall and are coupled magnetically to one another, the abrasive surface contacts the inner surface of the aquarium wall to allow cleaning of the wall.
