A task for those more scientifically inclined:
From the Havonec report about Nitrospira as the nitrite oxidizing bacteria.
"Three all-glass aquaria were established as described above. A 34-liter sample of city tap water, which was passed through activated carbon, was added to each aquarium, which contained 4.53 kg of gravel. Initially, 0.71 mmol of filter-sterilized (0.2-mm-pore-size filter) ammonium chlo-ride was added to each tank, followed by an additional dosing of 5.0 mmol of NH4 Cl
on the fourth day. On days 10, 15, 18, 23, and 30, further ammonia additions of 8.9 mmol were made to each aquarium. During the test, a total of 50.4 mmol of ammonia was added to each aquarium. Water samples werecollected daily"
Question: What is mmol of ammonium chloride as a ppm
in their 34 liter water sample?