Marine Sources K1 Filter Media

Marine Sources K1 Filter Media

Marine Sources K1 Filter Media is a high-performance biological filtration media engineered to support the growth of beneficial nitrifying bacteria, making it an excellent choice for both freshwater and marine systems. Unlike traditional static filter media, K1 excels in mobile or fluidized bed setups—its unique wheel-shaped or tumbling design provides exceptional surface area and supports rapid, efficient bacterial colonization.

The media’s design ensures that water flows smoothly around each piece, preventing dead zones and encouraging optimal contact between water, oxygen and bacterial colonies. This continuous circulation helps reduce ammonia and nitrite buildups and keeps water parameters stable—key to a healthy, thriving aquatic environment. According to manufacturer examples, it can offer up to 5× more surface area than standard bio-media, promoting significantly higher nitrifying bacteria populations.

K1 filter media adapts well to a variety of filter systems, such as sumps, reactors, canisters and fluidized beds. Whether you are establishing a new aquarium, upgrading your filtration system, or refining your reef setup, it offers a robust and efficient solution for supporting biological filtration and maintaining water clarity.

Key Highlights

• Delivers massive surface area for beneficial bacterial growth

• Ideal for reducing ammonia and nitrite in both fresh and saltwater systems

• Adaptable in mobile/ fluidized media systems or static filter media setups

• Durable, reusable and long-term media performance

• Comes in 2.5L bags

By incorporating Marine Sources K1 Filter Media into your filtration strategy, you’re investing in a highly effective and future-proof media solution that helps maintain water quality and keeps your aquatic inhabitants healthy.

View our other Filter Media here.

McMerwe’s comments: Marine Sources K1 Filter Media is a highly efficient biological filtration medium designed to maximize surface area for beneficial bacteria growth in ponds, sumps, and aquarium filters. Its floating design allows for constant movement and self-cleaning action, ensuring optimal oxygenation and nutrient exchange. [Rating: 5/5]