A blood cleansing system includes: a weight scale; a container support device for supporting a container of a blood treating fluid, wherein the container support device includes: an attachment member for coupling the container support device to the weight scale; a joint body attached to the attachment member and configured to rotate about an axis of the attachment member; a support body secured to the joint body; and at least one container support extending from the support body, wherein the container support is configured to stably support the fluid container.