Aerating pumps for aquaria; Air diffusers for aquariums; Aquarium pumps; Pond and water garden aeration systems comprising water pumps, air compressors, air blowers and a finned wheel for pressurizing and aerating ponds and aquariums; Submersible pumps; Water aeration systems comprising water pumps, air compressors and air blowers; Water pumps for swimming pools; Water pumps for use in motors and engines; Wave-making pumps for aquariums