Dennerle | Filter Extension

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Dennerle Filter Extension for Nano Corner Filters DE-FX This attachable add-on filter is designed to fit the Dennerle Nano Corner Filter and Nano XL Corner Filter. It increases fil ter capacity or can be utilized with phosphate binders or activated carbon for short-term additional filtration. This is especially important for tanks with fish. Just fill it with media and rinse to remove any residue caused by abrasion in transport, and then clip it on your filter. It can be used to hold biofilter granules, algae stop, or activated carbon. Show more