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DLP Alfagrog E40 Rock Biological Filter Media 15Kg

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£16.99 (Delivery from £6.95)
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  • Porous ceramic rock with large surface area
  • Ideal biological filter media for ponds and aquariums
  • Approximately 40mm pieces


Alfagrog is a pH neutral porous ceramic material that has a huge surface area and is ideal for pond and aquarium filtration. It is a lightweight material formed from clays and other raw materials that are then sintered at high temperatures resulting in this porous foamed ceramic.

Alfagrog has such a high surface area that you would need up to 20 times more volume of foam to create the same biological effect as this E40 Alfagrog media

  • Highly porous with large surface are for great filter bacterial growth
  • As a guide use 1 litre of Alfagrog per 1000 litres of pond water.
  • Small size avaliable E25 Alfagrog
  • Free Delivery on orders over £39.99
  • Postage from £3.95 for smaller orders
  • Express 24hr postage option available
  • 14 day returns
  • International Shipping on non electrical products only
We aim to ship all orders received by 12 pm the same day with the exception of fibreglass fish ponds, Gardeco products & other special order products.
The 24 hr postage option does not include deliveries at weekends or bank holidays.
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