• Aquaria &

    Healthy and sustainable
  • Water

    innovative and cost effective
  • Swimming

    Swimming in drinking water
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For a healthy and sustainable swimming experience Read More


Innovative and efficient water treatment solutions Read More


Sustainable and healthy water treatment for fish and sea mammals Read More
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AFM® Activated Filter Media

AFM® Activated Filter Media is a direct replacement for sand, doubling the performance of sandfilters without the need of additional investments in infrastructure. AFM® resists biofouling, biocoagulation and transient wormhole channeling of unfiltered water and never needs to be recharged or replaced.

AFM® is a highly engineered product manufactured from a specific glass type, processed to obtain the optimum particle size and shape. It is then exposed to a 3-step activation process to increase its surface area by up to 300 times for superior mechanical and electro-static filtration performance. 

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About Us

Dryden Aqua is one of the largest manufacturer of glass filtration media. As marine biologists, we have a unique knowledge combination and detailed understanding of the biological as well as the physio-chemical reactions in water. This has enabled us to develop and manufacture a highly innovative range of products such as the Activated Filter Media AFM®.

We are proud to provide sustainable and cost-effective solutions for the drinking & waste water industry, for aquaria and aquatic life support systems as well as for swimming pools worldwide.

Our Management Team

Howard Dryden

Dr. Howard Dryden

CEO & Founder, Dryden Aqua Ltd., Scotland

Dr. Howard Dryden is the founder of Dryden Aqua Ltd and a marine biologist from Edinburgh. The company was founded from his PhD research on molecular sieve ion exchange zeolitic sand filtration systems for closed system aquaculture, and development of intensive aquaculture technology.

Dr. Dryden has unique knowledge combination of biology, chemistry and technology and is the inventor of the activated, bio-resistant filter media AFM®. Dr. Dryden is one of the world`s leading experts in sustainable water treatment.

Dominik Graf

Dominik Graf

Managing Director, Dryden Aqua Distribution AG, Switzerland

Dominik Graf is the managing director of Dryden Aqua Distribution AG, responsible for all Dryden Aqua activities in Europe. Dominik Graf has a master’s degree in economics from the University of St.Gallen/Switzerland and has over 20 years of extensive leadership experience in the international swimming pool and water treatment industry.

Philipp Meyer

Philipp Meyer

Managing Director, Dryden Aqua Ltd., Scotland

Philipp Meyer is the managing director of Dryden Aqua Ltd and VP Sales/Marketing at Dryden Aqua Group. He has a master’s degree in business administration from the University of St.Gallen/Switzerland and has extensive international experience in sales, marketing and general management for direct and multi-level distribution for a leading-edge technology manufacturer in the global construction industry.

Mike Causer

Mike Causer

Technical Director, Dryden Aqua Group

Mike Causer is the technical director at Dryden Aqua Group. He is a marine biologist with over 30 years experience in management, conception and design of very large public aquaria with particular expertise in water treatment. Mike’s close working relationship with Dryden Aqua dates from the early 1990’s and his knowledge and experience since 2003 with AFM® includes aquariums, swimming pools and a diverse range of water treatment applications.


Our mission is to provide solutions that have a positive environmental impact on our ecosystem. We help to make this world a better place: a non-toxic environment for everyone.