The aim of peritoneal dialysis (PD) remains to deliver "appropriate" renal replacement therapy, including sufficient ultrafiltration, correction of acid-base balance, and adequate dialysis dose. We switched our pediatric patients on automated PD from standard lactate-buffered glucose solution (Dianeal: Baxter Healthcare SA, Castlebar, Ireland) to bicarbonate/lactate-buffered solution (Physioneal: Baxter Healthcare SA) as soon as it became available in our country. We also decided to deliver "optimal" dialysis in children by prescribing a long daytime dwell with icodextrin solution (Extraneal: Baxter Healthcare SA). But, adding those three benefits together--APD, Physioneal, and a long dwell with icodextrin--the result, at least in children, was a possible overcorrection of acidosis and an evolution to alkalosis. Thought must be given to developing solutions with varying bicarbonate concentrations for various treatment modalities.