Description Dog Rocks are a naturally occurring paramagnetic igneous rock. When placed in water, they will help purify the water by removing nitrates, ammonia & harmful trace elements like tin and copper giving your dog a cleaner source of water as well as lowering the amount of nitrates found in his diet. This will in turn lower the amount of nitrates expelled in his urine. The overload of nitrates in pet urine that causes the lawn to yellow.Key Benefits:Dog Rocks are a product mined in Australia that helps prevent those nasty yellow urine burn stains appearing on your lawnWhen placed in water, Dog Rocks help purify the water by removing the nitrates, ammonia and harmful trace elements like tin and copper giving your dog a cleaner source of waterLowers the amounts of nitrates found in your dog's diet, therefore lowering the amount of nitrates expelled in his urine that causes the lawn to yellowDog Rocks is a 100% natural, proven, and hassle-free prevention to canine lawn urine burn patchesNo medication required and they are safe for all household pets