[Dorothee Jöllenbeck-Pfeffel]

Hi A.J.,
perhaps I overread it, but I can’t find any informations about what you feed your Paros beside microworms at the moment. Arthemia? Or dried food?
Or do you have many plants in the tank, which don’t like sour water and which are dissolving themselves?
There must be something in the tank which causes these many degradation products.