![Amazon.com: Tetra Easy Crystal Carbon Filter Cartridge C250/C300 (Pack of 3) (One Size) (Green) : Pet Supplies Amazon.com: Tetra Easy Crystal Carbon Filter Cartridge C250/C300 (Pack of 3) (One Size) (Green) : Pet Supplies](https://images-na.ssl-images-amazon.com/images/I/71+l4zut6gL._AC_UL600_SR600,600_.jpg)
Amazon.com: Tetra Easy Crystal Carbon Filter Cartridge C250/C300 (Pack of 3) (One Size) (Green) : Pet Supplies
![TETRATEC EASY CRYSTAL CARBON FILTER PACK C 250 300 TETRA FISH TANK FILTER MEDIA 4004218151598 | eBay TETRATEC EASY CRYSTAL CARBON FILTER PACK C 250 300 TETRA FISH TANK FILTER MEDIA 4004218151598 | eBay](https://i.ebayimg.com/images/g/pZAAAOSwP8djtAOR/s-l960.jpg)
TETRATEC EASY CRYSTAL CARBON FILTER PACK C 250 300 TETRA FISH TANK FILTER MEDIA 4004218151598 | eBay
![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://i.redd.it/j3evdkmd4kh31.jpg)
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 Filter Pack 600C 174665 Filter Cartridge with Active Carbon : Amazon.co.uk: Pet Supplies Tetra EasyCrystal Filter Pack 600C 174665 Filter Cartridge with Active Carbon : Amazon.co.uk: Pet Supplies](https://m.media-amazon.com/images/I/91qSTbOGqwL._AC_UF894,1000_QL80_.jpg)