Dennerle Nano Filter Extension - Additional Filter for Nano Corner Filter

The Dennerle Nano Filter Extension is an additional filter for the Nano and Nano XL corner filters. It increases filtering performance or allows for targeted water treatment with activated carbon, phosphate binders, or biological granules.

💡 Expert tip: The Nano Filter Extension is particularly useful after medication treatment or in case of algae bloom: insert activated carbon to quickly remove chemical residues from the water. Once the treatment is finished, remove it so as not to hinder ordinary biological filtration.