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 300 - Shop at Vivapets
Tetra EasyCrystal Filter Pack 250/300
Tetra EasyCrystal Filter Pack 250/300
Tetra EasyCrystal Filter Pack C 250/300 with Activated Carbon - HugglePet
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