JBL Symec Filter Floss 100 g is a premium synthetic filter wool developed to provide fine mechanical filtration in aquarium filters, efficiently trapping suspended debris and micro‑particles that cause water cloudiness. By capturing fine algae, uneaten food, and organic waste, this media significantly improves clarity and supports a healthier environment for fish and plants.​

Made from fully synthetic, residue‑free fibers, JBL Symec does not release pollutants, dyes, or softeners into the water, ensuring maximum safety for sensitive species and planted aquariums. It is suitable for use in freshwater and marine systems, and can be placed in internal filters, external canister filters, hang‑on‑back filters, and sumps.​

For optimal performance, JBL Symec Filter Floss should be used as the final stage of filtration, after coarse sponges and biological media, so that it can “polish” the water before it returns to the aquarium. Beginners will find it easy to use: simply take the required amount of floss, fluff it lightly so water can pass through, place it as the last layer in the filter, and replace it when the water flow decreases.​

Because the fibers trap extremely fine particles, the material can clog over time, which is a sign that it is working effectively. While gentle rinsing in aquarium water is possible, manufacturers recommend replacing the floss regularly rather than washing it repeatedly, to maintain strong filtration and stable water parameters. Used correctly, JBL Symec Filter Floss helps keep the aquarium water bright and clear, making fish colors more visible and plants more attractive, which is especially reassuring for new aquarists setting up their first tank.​

Beginner‑friendly usage guidance

• Rinse the required amount of floss briefly in clean water before use to remove any loose fibers.​

• Place the floss loosely in the filter, avoiding tight compression so that water can flow evenly through it.​

• Use it after coarse and medium filter sponges and biological media, as a final polishing layer.​

• Check the filter weekly; replace the floss when the flow rate drops or the material stays dark and clogged after gentle rinsing.​