I was under the impression that only a few species of heterotrophic bacteria would utilize NH+4, and even then, it was in the absence of other nitrogen-based energy sources (a condition unlikely to be encountered in an aquarium)
@Lasse ?
Also, I very much agree on the use of urchins. They’re tremendous algae grazers, they eat practically any kind of algae out there. Not sure if they eat most dinos and cyanos...they might, but that stuff grows back so fast nobody would ever know it’s been eaten.
If you have asked me this a week ago you have had the answer autotrophic organisms are autotrophic and only use inorganic nutrients and heterotrophic organism are heterotrophic - using only organic nutrient. But - with the NH4/NH3 thats not true. Bacteria and many algaes are single cells organisms - it means that NH3/NH4 can penetrate the cell membrans directly - it is a part of the nitrogen transport into the cellsystems. Another funny fact is that even aminoacids can do this and thats has been shown that the cellmembran transport favor aminacids before NH3/NH4. I have had this discussion the last days with a guy at the Swedish salt water forum - his PHD thesis was about these things It is true for organisms that have a single cells layer between the body and water too - like the coral animal
Sincerely Lasse
Last edited: