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Tetra Easy Crystal Carbon Filter Cartridge C250/C300 (Pack of 3) (One Size) (Green) : Pet Supplies - Amazon.com
![Purigen - I am running a Tetra Easycrystal Filterbox 600 which came with my tank (unfortunately since it's freaking huge). I wanted to put some Purigen in there, but where do I Purigen - I am running a Tetra Easycrystal Filterbox 600 which came with my tank (unfortunately since it's freaking huge). I wanted to put some Purigen in there, but where do I](https://preview.redd.it/j3evdkmd4kh31.jpg?auto=webp&s=b9e1ce4950d624a82149ecad23228aecdc2bce68)
Purigen - I am running a Tetra Easycrystal Filterbox 600 which came with my tank (unfortunately since it's freaking huge). I wanted to put some Purigen in there, but where do I
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