Patent ID: 8161909

Claim:
An aquarium wall cleaning device comprising: a first flexible member including: a main body formed entirely from a flexible buoyant material, wherein the main body is configured to conform to a curved surface of the aquarium wall during use; a first magnetic or magnetically attractable element disposed within a through hole defined in the main body of the first flexible member; and a first layer attached to the main body of first flexible member and having an abrasive surface, wherein the first flexible member is substantially neutrally buoyant or negatively buoyant in water; and a second member including: a main body; a second magnetic or magnetically attractable element disposed within the main body of the second member, wherein at least one of the first and second magnetic or magnetically attractable elements comprises a magnetic material and the other of the first and second elements is magnetically attracted to the magnetic material; and a second layer attached to the main body of the second member, wherein when the first flexible member and the second member are placed on opposite sides of an aquarium wall and the first and second magnetic or magnetically attractable elements are attracted to one another, the first and second layers contact respective inner and outer sides of the wall to allow cleaning of at least one side of the wall.