The Only 100% Natural and Safe Solution for Burn Marks, Yellow Patches and Brown Spots Caused by Your Dog's Urine Dog Rocks will help stop pet urine burn patches ruining your lawn, grass & hedges. One pack of Dog Rocks in your dog’s water bowl will keep your lawn in tip-top condition for up to 2 months. Dog Rocks are the only 100% natural & convenient solution proven to have no change to the pH balance of your pet’s urine, it’s as simple as that. Many pet owners will experience dog urine is getting their grass not beautiful at some point, and those unsightly yellow burn marks on your lawn can become a real problem if you don’t deal with them at the source - your dog! Many products claiming to cure your lawn of burn marks will lower the pH of your dog’s urine, which can cause urinary tract infections when used long term. Dog Rocks work by removing the nitrates from the water, and do not change the pH of your dog’s pee. They are completely natural with no known side effects. The Only Original and That Works Best! Original Dog Rocks do not alter the pH balance of your dog’s urine. Dog Rocks are a completely natural product sourced from a reputable quarry in Australia. Easy to Use with No Hassle - You Only Need Dog Bowl, Water, and Dog Rocks It is important to let the rocks submerge in the water bowl for 10 hours to become effective. Simply place the rinsed rocks in your dog bowl with a maximum of 2 liters of water (about 1 and a half gallon). The rocks will last 2 months and then need replacing. Use the supplied sticker as a reminder for fresh rocks. If your loving pet goes on vacation, it is possible to take the rocks out of the water for reuse later. Happy Dog, Happy Lawn! No more yellow patches, burn marks, and brown spots on your lawn. Now you and your dog can have more happy playtime together without any worries.