
Dog Rocks are pieces of volcanic rock consisting of 100% natural minerals. Dog Rocks are lab tested and do not affect the acidity (pH level) of the drinking water, taste or urine and are safe for all other pets in the family. Place the Dog Rocks in your pet's water bowl and fill the bowl with up to 2 liters of fresh water. Top up the water so that there is constantly clean water in the drinking bowl. Dog Rocks filter the ammonia and nitrates that cause burns from drinking water. They do not affect the pH value of your pet's drinking water or urine. Dog Rocks changes the ion exchange in the water, causing the nitrate level to drop. Lower nitrates mean no more burn marks in the grass. Dog Rocks take 8 to 10 hours to remove the impurities. Dog Rocks works less well if: Your dog is fed protein-rich food or raw, red meat, your dog has multiple drinking places, the ratio of liters of water per 200 grams of Dog Rocks is not adhered to. The waterbowl is emptied instead of refilled.