Here's a further study, and nice piece on the subject.
quarium Nitrification Revisited: Thaumarchaeota Are the Dominant Ammonia Oxidizers in Freshwater Aquarium Biofilters
- Laura A. Sauder,
- Katja Engel,
- Jennifer C. Stearns,
- Andre P. Masella,
- Richard Pawliszyn,
- Josh D. Neufeld mail
- Published: August 16, 2011
- DOI: 10.1371/journal.pone.0023281
http://www.plosone.org/article/info%...l.pone.0023281
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