Tetra EasyCrystal Filter Pack 600C 174665 Filter Cartridge with Active Carbon : Amazon.co.uk: Pet Supplies
Tetra EasyCrystal FilterBox 300: Tetra
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
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