Features: 1. The unclean water tank can negatively impact the health of farm animals. Reduce the need for frequent water changes with cloudy tanks. The Water Purifier Cubes are ultra-absorption activated carbon blocks designed to help maintain clean drinking water for farm animals. 2. Water Purifier Formulas: Made from honeycombed ultra-absorption activated carbon blocks, these cubes effectively filter dirt, cloudiness, and odor from livestock water troughs. Solid composition with no powder or impurities, and will not discolor water. 3. Safe for Animals: Designed to provide cleaner water for various animals, including fish and reptiles. For animal use only. 4. Easy to Use: Simply place the cube into the water tank. Rinse with warm water before initial use. Can be rinsed with warm water and reused. With proper maintenance, each cube lasts up to 6 months for optimal performance. One cube treats up to 150 liters. Depending on tank size, multiple cubes may be required. 5. Help ensure cleaner drinking water for farm animals or fish 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