Inclusion Criteria:  Functioning Tenckhoff catheter Stable PD prescription regimen (continuous ambulatory PD or automated PD) for the past month Age 18 years or older Willing and able to provide informed consent  Exclusion Criteria:  Type 1 or uncontrolled diabetes mellitus Active infections Pre-study serum sodium <130 mmol/L Serum bicarbonate < 18mmol/L Patients with standard PD prescriptions relying exclusively on lowest glucose containg fluid