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- Smallworld replacement filtration cartridges contain two filtration units.
- Replacement filtration cartridges are designed to fit Smallworld filter unit (SWF1).
- Filtration cartridges work to keep fish healthy.
- Smallworld filtration cartridges keep aquarium water looking crystal clear for 2-4 weeks.
- Cartridges are easy to replace and easy to dispose of.
- Replacement cartridges fit on any shape tank.
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