Suggest Treatment Fro Multiple Calculi In The Kidney

There is a stone of size 1.4cm at the proximal ureter of my left kidney. And also hydronephrosis. So kindly tell me can i drink plenty of food in this situation? Let me also tell u that there r multiple calculi in my both kidneys and my ESWL is also planned. I just want to know about the quantity of fluid intake in such situation.