In the article titled “Decay Experiments of Effective N-Removing Microbial Communities in Sequencing Batch Reactors” [1], Professor Dr. Barth F. Smets and Dr. A. Gizem Mutlu were missing from the authors’ list. Professor Smets was fully involved in the planning and design of the study, as well as the interpretation of the results, and he revised an earlier report of this research. Dr. Mutlu was fully involved in the experimental design, conceptualization, and methodology, provided the initial biological material for the decay experiments, and provided substantial guidance throughout the decay experiments and data collection, as well as analysis of the data, interpretation of the results, and presentation of the data in an earlier report of these results. Additionally, there was a missing affiliation for the first author. The corrected authors’ list and affiliations are shown above.