Pond and water garden aeration systems comprising water pumps, air compressors, air blowers and a finned wheel for pressurizing and aerating ponds and aquariums; Pumps and compressors as parts of machines, motors and engines; Aquarium pumps; Centrifugal pumps; Electric pumps; Positive displacement pumps; Sewage pumps; Submersible pumps; Sump pumps; Vacuum pumps