Dog Rocks filter out impurities from water, such as Tin, ammonia and nitrates. These impurities are usually passed out through urine, and when your grass comes in contact with these elements it is burned, resulting in a dead, yellow patch on your lawn. Without the impurities in the water, Dog Rocks® actually help your dog fertilize your lawn! This is great for you, your dog & your lawn!  200 Grams (works for 2 months.)

By simply placing contents of Dog Rocks® packet into your pet's water bowl and filling it with no more than 2 liters of water your lawn will start to look greener and fresher.