I know we've been bitch slapped on this thread already, but I have reached the age that medical conditions enter every conversation.
My last hospital visit for kidney stone, I grow the stag horn variety, I received the best advice ever, and it has worked for nearly 13 years! One of my nurses looked at my chart and saw kidney stones and gall bladder. She then said that she had had kidney stones, gallbladder attacks and a child. Then she stated that kidney stones were the worst. Her advice - "If there is any color to your urine you are not drinking enough water." Ever since I stay on top of the water.
My stones are a gout thing, and I have learned that if I want to eat steak, or any other beef or tuna, I can counter act and avoid the following pain by flushing my system with plenty of water for a couple days.