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Tetra EasyCrystal Filter Pack C250/300 filter material with activated carbon, filter pads for EasyCrystal internal filters, suitable for aquariums from 15-60 liters, 3 pieces, Green : Amazon.co.uk: Pet Supplies
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Amazon.com: Tetra Easy Crystal Carbon Filter Cartridge C250/C300 (Pack of 3) (One Size) (Green) : Pet Supplies
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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)