An automated peritoneal dialysis apparatus includes at least one pump and a memory device configured to simultaneously store a first standard ultrafiltration (“UF”) therapy prescription with a longer duration and a lower dextrose concentration and a second standard UF therapy prescription with a shorter duration and a higher dextrose concentration. A logic implementer of the automated peritoneal dialysis apparatus is programmed to receive a patient weight value and determine a weight difference between the patient weight value and at least one prior patient weight value. When the weight difference is below a threshold, the logic implementer causes the first standard UF therapy prescription and the second standard UF therapy prescription to be displayed as possible options for selection and when the weight difference is above the threshold, the logic implementer prevents the second standard UF therapy prescription from being displayed as a possible option for selection.