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
Tetra EasyCrystal FilterBox 600: Tetra
Tetra EasyCrystal Filterpack C 100
Tetra EasyCrystal Filter C 250/300 with Activated Carbon. Filter Material. Aquarium Power Filter Cartridges.|aquarium power filter|filter cartridgepower aquarium filters - AliExpress