The present invention constitutes dialysate formulations that are suitable for use in preparing dialysate solutions for use in batch andor proportioning systems and for improving dialysis efficiency by reducing or preventing clotting of the dialysis flow paths. Electrodes are located within enclosed inlet and outlet manifolds on either side of the partition array. A hidden-refresh controller couples to an array of dynamic memory cells during a hidden-refresh of the array of dynamic memory cells. The drawer interlock is an integral element fixed on the drawer for simplified assembly and operation.