Free UK Delivery*\n\n POND \n AQUARIUM \n PET \n\nSuperFish Pond & Aquarium Biological Filter Media\n\nFREE UK DELIVERY\n\n--ASK A QUESTION\n\n--SAVE AS FAVOURITE SELLER\n\n--SEE SIMILAR ITEMS\n\n--SEE OUR FEEDBACK\n\nKey Features\n\n--Superior Surface Area - Provides a massive 270m squared of surface area per litre, offering significantly more space for beneficial bacteria to colonize than standard ceramic rings.\n\n--Rapid Water Purification - Acts as a high-performance biological engine to quickly break down toxic ammonia and nitrite, ensuring a safe and stable environment for fish.\n\n--Bulk 10L Capacity - This high-volume bag is specifically sized for large-scale filtration systems, making it the most cost-effective solution for koi ponds and large aquarium sumps.\n\n--Advanced Sintered Glass Construction - Manufactured from porous sintered glass rather than basic clay, the open-pore structure allows for better water flow and prevents clogging.\n\n--Universal Filtration Compu