A method to form a dialysis composition includes determining for a patient a prescribed calcium concentration for a dialysis fluid to be administered to the patient. The determination is made based on a non-citrate containing calcium dialysis fluid. 0.5 to 3 mM citrate and 1 to 5 mM total calcium are introduced to the dialysis fluid. The total calcium results in a calcium concentration that is 0.1 to 0.2 mM per 1 mM citrate greater than the prescribed calcium concentration. 0 to 1.5 mM total magnesium is introduced to the dialysis fluid.
