JUWEL COMPACT ANTI-NITRATE FILTER SPONGE STR. M

The Juwel nitrax filter sponge reduces the nitrate content in the aquarium water, which leads to a significant reduction in algae growth.
Nitrax is a biological filter sponge that helps break down waste materials, e.g. ammonium, nitrite and nitrate in your aquarium and thus reduce the risk of mortality.
The package contains 1 pc. nitrax filter sponge.