Improvement in stone-recurrence fluid is a continuous process, observed even a low volumes and with small increments. Frank et al,[9] compared the incidence of urolithasis in two desert towns of Israel, Arad and Beersheba, after 3-years of education regarding fluids. They found a lower prevalence of urolithiasis in Arad (0.28% vs. 0.85%, P=0.001) with only a quarter litre increase in urine output (1071 ml vs. 804 ml). In a prospective randomized trial Borghi et al,[10] found that doubling of urine volume to >2 litre led to an over 55% decrease in stone recurrence (12/99 vs. 27/100; P=0.008) over 5 years. Improvement in stone-recurrence fluid is a continuous process, observed even a low volumes and with small increments.