Water Purifier Bio Cube for Livestock Aquarium & Horse Trough instantly purifies algae-filled water, making it safe for your animals to drink. The energy-free, self-contained cube uses a honeycomb Ultra-Absorption Activated Carbon Block to remove algae, dirt, odors, and pathogens, delivering cleaner drinking water with minimal maintenance. Ideal for paddocks, barns, and troughs.

• Compact design: 3.94 × 3.94 × 1.97 inches with a honeycombed Ultra-Absorption Activated Carbon Block.
• Capacity: Treats up to 40 gallons per cube.
• Purification: Quickly removes algae, bacteria, parasites, dirt, cloudiness, odors, and other unwanted organisms.
• Airtight seal: Keeps water clean even without a continuous air pump and helps prevent black water.
• Easy to use: Just fill the water tank with one or more cubes; no wiring or plumbing required. Replacement advised every six months. Includes 1 BIO-Cube.