1. The unclean water tank may be harmful to the life of your farm animals. You can avoid the trouble of constantly changing cloudy water tank. The Water Purifier Cubes is an Ultra-Absorption Activate Carbon Blocks that can maintain clean drinking water for your farm animals. 2. Water Purifier Formulas: The Water Purifier Cubes is made of Honeycombed Ultra-Absorption Activate Carbon Blocks that can effectively help to filter dirt, cloudiness, smell, etc. in livestock trough. It has solid composition, no powder, no impurities, and does not cause black water. 3. Safe For All Animals: The Water Purifier Cubes is specially made to provide clean water for all animals, including fishes and reptiles. It is safe for use for animals only. 4. Easy to Use: Simply put it in the tank. Just wash it with soap and warm water, and you can put it back in the water tank again. Wash the cubes with warm water before using. These cubes are long-lasting with maintenance but advisable for a change every 6 months to ensure clean drinking water for animals. One cube works for 150L. Depending on the size of the tank, a few blocks might be needed. 5. Ensure Clean Drinking Water For Farm Animals or fishes with Water Purifier Cubes Today Get Yours NOW(Note: This product does not work for humans' drinking water.) 6. Actual color may be slightly different from the image due to different monitor and light effect. Please allow 1-3cm deviation due to manual measurement. 7. Specification: Material: Natural activate carbon, sepiolite clay mineral; Size: 10*10*10cm 8. Includes: 1/2/4(optional) x Water Purifier Cubes 9. About Shipping: All items will be shipped within 3 business days after the payment is received. Most times you will receive them within 8-12 days then. The specific delivery time is depend on circumstances. 10. Any questions, please feel free to contact us. During the shopping process, if you have any questions, please feel free to consult us, we will reply you within 24 hours, wish you a happy shopping. Thanks for your cooperation and we'll make you feel satisfied.