How to Lose Weight and Clean Kidney

I passed a 1/4 inch, flat, sunflower seed shaped, light beige kidney stone in 2015 and another one a year later by taking a product called “Stone Free” by Planetary Herbals from SwansonVitamins.com. It comes in a bottle of 820 mg, 180 tablets. For kidney and gallbladder support.
I took one tablet morning and evening for 7 days, then waited about 3 weeks and the kidney stone would pass with the urine. I could feel it pass each time, so I retrieved them, rinsed them off and put them in a small plastic zip lock bag.
I am repeating the 7 day course every 6 weeks but I don’t think I passed a stone this last round, even though there could have been slurry or sediment passed.
A bottle would last almost 13 cycles that way or about 20 months.
The instructions say 2 tablets in the morning and 3 tablets in the evening between meals, but I took less than that, and only for 7 days per year, and it still worked to eject a stone in two separate years. It has some interesting herbs in it.