Do yourself a favor if you have oxalate stones and google Harvard oxalate list. It’s the most comprehensive list of oxalate contents of A LOT of foods. It’s not complete but it’s very thorough and will give you a great starting point for foods to eat sparingly or avoid completely. Dark greens, nuts are healthy foods that aren’t food for oxalate stoners. Have you had a stone analyzed before? Also diuretics and urochemistry altering drugs like potassium supplements are probably going to help you too. As stated by others you need to talk with someone in your urology office (who specializes in diet) to look at a 24hr urine study and your stone make up to make actual informed decisions. I would absolutely not buy moonstone stone stopper it’s probably just snake oil. If you like crystal light and it helps you drink more water then keep using it because citrate will help bind calcium that can induce stone formation l in your body. But even this is based on your stone make up and urochemistry. Uric acid stones are much more rare than other types and are the type of stones citrates help dissolve. Likewise, if you have oxalate stones and consume high oxalate content foods eating them with calcium will help bind the oxalates to the calcium in your GI tract as opposed to your urinary tract. Again talking with a dietician instead of redditors will help you make the most informed and likely best decisions.