Pure Cube Water Trough Filter 2.0 Super‑Strong Filtration Aquarium Water Trough Activated Carbon Purifier Cube for Horse, Livestock, Fish Tanks & Ponds,Blue，for 20 Gallons Tank

Ultra‑Strong Filtration & Odor Control: Honeycomb‑structured activated carbon maximizes surface area to adsorb contaminants, remove odors and keep water crystal‑clear.(Note: It will begin to take effect one week after placing it in the fish tank.)

Multi‑Use Versatility:One purification cube is needed for every 20 gallons of water. If the water tank volume is greater than 20 Gallons, more cubes are required. Safe and effective for aquariums, fish tanks, ponds, horse/livestock troughs and outdoor water features—A cube can be used in multiple scenarios.

Eco‑Friendly & Reusable: Durable Activated Carbon block with cotton wrap can be rinsed and reused for up to 6 months, reducing waste compared to disposable filters.

Easy Setup & Maintenance: No tools required—simply rinse cube with warm water, place in water inlet or trough, and replace every 3–6 months for optimal performance.

Premium Honeycomb Design & Ideal Dimensions: Compact 4 × 4 × 4 inch (≈10 × 10 × 10 cm) cube fits most tanks and troughs, while its rigid honeycomb structure ensures long‑lasting filtration power.