In the present invention, a dual hull cyclone is incorporated into a non-powered cleaning system using balls for tubular heat exchange systems. The dual hull cyclone separates balls which are smaller than a predetermined diameter so that they can be disposed of and replaced. The dual hull cyclone also serves to separate debris from fluid in the tubular heat exchange system and also debris that may have accumulated on the balls. The cleaning system in accordance with the present invention comprises a plurality of balls circulating in the fluid of the heat exchange system, a ball inlet, a ball outlet, and a dual hull cyclone. The balls in the fluid are generally of a predetermined diameter suitable for cleaning the tubes in the heat exchange unit. While the balls may be made of a variety of elastomeric materials, almost any resilient material may be utilized. Furthermore, the balls used in the present invention utilize a asymmetrical weighted core to increase the specific gravity of the balls.