Keywords: Aquarium Nitrogen CycleZP.svg Diagram of the nitrogen cycle in an aquarium Drawn by XcepticZP original available at Image Aquarium_Nitrogen_Cycle png Transferred from http //en wikipedia org en wikipedia; transferred to Commons by User Liftarn using http //tools wikimedia de/~magnus/commonshelper php CommonsHelper <br/> Original text Own work 12th of July 2007<br/> 2007 07 12 first version ; 2007 10 29 last version Users XcepticZP Original uploader was XcepticZP at http //en wikipedia org en wikipedia Later version s were uploaded by Shandris at http //en wikipedia org en wikipedia Released into the public domain by the author en wikipedia XcepticZP Original upload log page en wikipedia Aquarium_Nitrogen_CycleZP svg 2007-10-29 11 36 Shandris 774×490× 64892 bytes <nowiki>Proper fix </nowiki> 2007-10-29 11 32 Shandris 774×490× 57897 bytes <nowiki>Fixed chemical forumulae </nowiki> 2007-07-12 17 17 XcepticZP 774×490× 35191 bytes <nowiki> Diagram of the nitrogen cycle in an aquarium Drawn by XcepticZP original available at Image Aquarium_Nitrogen_Cycle png Own work 12th of July </nowiki> 2007-07-12 17 02 XcepticZP 774×490× 35191 bytes <nowiki> Diagram of the nitrogen cycle in an aquarium Drawn by XcepticZP original available at Image Aquarium_Nitrogen_Cycle png Own work 12th of July </nowiki> Nitrogen Nitrogen cycle Aquatic ecology |