Our offices are closed from Wednesday 24th 2025 until Monday 5th January 2026
Orders received after 12:30pm on Wednesday 17th December 2025 will be shipped on Wednesday 7th January 2026
Understanding our filtration media
Choosing the right filter media is essential for keeping your water clear, healthy, and stable. Every type of media plays a role in both mechanical and biological filtration, helping remove debris while supporting beneficial bacteria that break down harmful waste. High-performance media gives these bacteria the surface area and environment they need to thrive, ensuring your filter runs efficiently and your pond remains balanced over time.
Understanding how each media type works makes it easier to pick the right solution for your system whether you’re building a DIY filter, upgrading an existing setup, or simply looking for better all-round clarity and water quality.
Premium advanced filtration media
Choosing the right filter media is one of the most important steps in keeping your water clear and healthy. Whether you’re building a new system or upgrading an existing filter, Evolution Aqua’s media range is engineered to deliver reliable mechanical and biological performance.
Each product has been designed to maximise surface area, encourage strong biofilm growth, and keep your pond or aquarium running at its best. Above, you’ll find a quick comparison of our media using easy Top Trump style cards to help you choose the perfect option for your setup.
(Cell Structure)
(Benefical Bacteria and Microorganisms)
(Example of Quiet zones)
Stable bio-film development
The shape of K+Media optimises the amount of “quiet zones” within the media where a stable bio-film can develop. Whilst K+Media keeps the integral profile of K1 Media at its core, there is an extra layer of cells and fins around the outside of each piece that enable microscopic organisms such as Rotifers and Vorticella to thrive. This is an additional benefit as competitor media do not have such “quiet zones” that would allow these higher lifeforms of filter feeders to develop. The bacteria and organisms that form within the bio-film ensure the media delivers optimum levels of biological filtration in the moving bed, which has been proven filtration technology for many years in the fishkeeping hobby.
Why us?
Evolution Aqua’s filtration media has been engineered, tested, and refined over decades to give hobbyists and professionals the highest level of water clarity and biological stability. Each media type is designed with a purpose—whether that’s maximising protected surface area, accelerating biofilm growth, or delivering reliable mechanical performance in demanding environments.
Our floating and sinking options offer flexibility for any filtration setup, while the unique shapes and internal structures of the media ensure exceptional contact time, oxygenation, and waste breakdown. From compact micro media to large-format options for spacious filter bays, the entire range provides efficient, dependable performance that scales with your system.
Built on proven science and trusted in applications from home ponds to commercial aquaculture, Evolution Aqua media helps create cleaner, healthier, more stable water—so your fish and wildlife can thrive with minimal maintenance.
Data driven and Science backed
Specifications
| Media Type | Density | Colour | Diameter | Length | Total Surface Area | Protected Surface Area |
K+ Media | Floating | White | 10.2mm | 8mm | 1,350m2 per m3 | 1,025m2 per m3 |
K+ Media | Sinking | Black | 10.2mm | 8mm | 1,350m2 per m3 | 1,025m2 per m3 |
K3+ Media | Floating | White | 25mm | 10mm | 800m2 per m3 | 500m2 per m3 |
K1 Media | Floating | White | 10.5mm | 8mm | 950m2 per m3 | 500m2 per m3 |
K1 Micro | Floating | White | 7mm | 9mm | 1400m2 per m3 | 950m2 per m3 |
■ Available in bags of 25 litres and 50 litres
■ Floating version is coloured white
■ Sinking version is coloured black
Useful Information
FAQs: provide answers to the most frequently asked questions. Start typing the product name + your questions in the search box. Or click here to access the FAQs database.
Dealer Locator