This image was acquired from
wikimedia. It was marked as Public Domain or CC0 and is free to use. To verify, go to the source and check the information there.
Keywords from Image Description:
Ciclo dell'azoto in un acquario.svg en Italian translation of File Aquarium Nitrogen Cycle svg it Traduzione italiana di File Aquarium Nitrogen Cycle svg Traduzione italiana di File Aquarium Nitrogen Cycle svg Italian translation of File Aquarium Nitrogen Cycle svg DaniDF Aquatic ecology Nitrogen cycle SVG ecology