Natural filter rocks for saltwater aquariums.
Due to a highly porous surface. Bio-Rocks provide the ideal living environment for beneficial denitrifying bacteria. Supports the removal of nitrite and nitrate and stabilizes the biological balance. Bio-Rocks can be used permanently in all types of aquarium filters. Clean the rocks with lukewarm water twice or three times a year.
Grain size: 8-16mm
One tin is sufficient for approximately 500l of aquarium water.
Article no. 370
Made in Germany