Purchasing Tetra Tetra Smart Large Cartridges is the best way to make certain you achieve exceptional water clarity and odor-free water. The ultra-activated carbon in each cartridge takes fast action against discoloration and odors, while the dual-sided filter goes after particles large and small.

Features: Offers exceptional water clarity, More debris-trapping filter material than other products, Ultra-activated carbon absorbs discoloration and odors,
Includes: 4 large cartridges
Intended For: Aquariums
Material: carbon
Color: Green
Size: Large

Instructions:
1. Detach clip from Aerobic Frame and slide the filter bag over the frame.
2. Add one packet of Ultra-Activated carbon.
3. Press the Aerobic Frame flaps down over the top of the filter bag and press the clip down over the flaps.
4. Rinse filter cartridge under cool tap water
5. Open lid and insert filter cartridge into filter.
6. Replace clogged filter cartridge when there is reduced water flow out of the filter.