The Eickelboom filament morphotype commonly recognized as Haliscomenobacter hydrossis has a long and somewhat mysterious history.
Its recognized growth cause has changed from earlier literature as a low F/M filament type to other causes such as low DO and low phosphorus availability. The truth about this filament type is that there is very high potential genetic diversity within the Haliscomenobacter filament type with genera most commonly attributed to either the Chloroflexi or the Bacteroidota phyla and is is likely that the above list of causes may either be relevant or not depending upon the genetic diversity of the actual filament, and/or
