Erns
Since you are so intrested in amonia and nitrigon compounds here is one for you ;
It has just been proven that diluted human urine produces plankton that lives longer ,reproduces earlier , and creates more offspring .The explanation :the urine contains high concentrations of nitrogen compounds that degrade rapidly to release amino acids and minerals ,fertalizing the growth of algae, which the plankton then feeds on . For full info go to nature.com/news
May be we can throw out all the meters and .....
Regards
Eugene