[Cal_stir]

I work with ammonia and the human nose can smell it when concentrations cannot be detected with a ppm meter. Ammonia is readily adsorbed by water but I do not think it has an affinity with water as salt does so unless your litter box is right beside your storage container I would be skeptical that it is the cause, nitrates are a whole other animal that are not exported easily with conventional means and I hear of tanks with high nitrates that don't have a hair algae problem, I think po4 starts HA and then no3 can feed it, high nitrates need to be reduced with denitrators or WC's and then can be managed with pellet reactors and other forms of carbon dosing.