Features: 1. The unclean water tank can negatively impact the health of your farm animals. The Water Purifier Cubes are ultra-absorption activated carbon blocks designed to help maintain clean drinking water for your livestock. 2. Water Purifier Formula: Made from honeycombed ultra-absorption activated carbon blocks, these cubes effectively filter dirt, cloudiness, and odors from livestock water troughs. Solid composition with no powder or impurities, and will not discolor the water. 3. Safe for Animals: Designed to provide clean water for various animals, including fish and reptiles. For animal use only. 4. Easy to Use: Simply place the cube in the water tank. Rinse with warm water before initial use. Can be rinsed with warm water and reused. For optimal performance, replace every 6 months. One cube treats up to 150 liters of water. Multiple cubes may be required depending on tank size. 5. Help ensure clean drinking water for farm animals and aquatic pets with Water Purifier Cubes. Specification: Material: Natural activated carbon, sepiolite clay mineral Size: 10 x 10 x 10 cm Includes: 1/2/4 (optional) x Water Purifier Cubes Note: This product is not intended for purifying drinking water for human consumption. Actual color may vary slightly due to differences in monitor displays. Allow 1–3 cm variation due to manual measurement.