Only 12? You're a light-weight.
Seriously, I drink about 4 liters of water each day. I have had kidney stones in the past, with pain I would not wish on anyone. Since I started the water regimen, no more stones. No matter what 'evidence' this 'professional' conjures up, I will stick with what has worked.
Oh, and by the way, I have a 12-cup Mr. Coffee........that's just for breakfast. I never met a urinal I couldn't pass. :)
This guy clearly states that you would be a candidate for exta water intake, what with your stones. I think the guy is on to something.
Me, personally, since I only have 1.25 kidneys left, I Aint takin no chances.
Been there, done that, several times. Yes, I always have liquid around. Something I read was that reducing the calcium concentration doesn't prevent stone formation, but reducing oxylate concentration does. Worst culprit is spinach, which is disproportionatly high in oxylates, compared to just about anything else. I was eating spinach salad every day for months before my last one, and haven't touched the stuff since.
LOL! I don't know, but it seems to me passing a urinal would be more painfull that passing kidney stones.;^)