Recently I discovered for myself an interesting way to easily produce home made plant fertilizer that is quite effective. It's fish emulsion - 1 part fish wastes(skin/bowels) to 2 parts water placed in an airtight container in a sunny spot. The problem - it stinks unbearably. Both - the gas that is produced during the decomposition and the liquid(/fats).

1. Is it possible to neutralize the stench somehow without loosing the fertilizing qualities of the emulsion? Especially of phosphorus.
   1.1 Ideally of both - the gas and the liquid. But at least of the liquid - as that is what is used actually and then continues to spread the smell after being added to the plants.
   1.2 Ideally it should be done using some usual household substances/wastes - maybe adding of lemon/orange peels along with the fish wastes? Or maybe ash/charcoals?

2. Ideally the resulting emulsion should be acidic as many plants like the pH range of 5 - 6.5 .

Recently I discovered for myself an interesting way to easily produce home made plant fertilizer that is quite effective (tested myself on the plants). It's fish emulsion (so can be used also in a hydroponic system) - 1 part fish wastes(skin/bowels) to 2 parts water placed in an airtight container in a sunny spot for ca. 1-2 weeks. The problem - it stinks unbearably. Both - the gas that is produced during the decomposition and the liquid(/fats).

1. Is it possible to neutralize the stench somehow without loosing the fertilizing qualities of the emulsion? Especially of phosphorus.
   1.1 Ideally of both - the gas and the liquid. But at least of the liquid - as that is what is used actually and then continues to spread the smell after being added to the plants.
   1.2 Ideally it should be done using some usual household substances/wastes - maybe adding of lemon/orange peels along with the fish wastes? Or maybe ash/charcoals?

2. Ideally the resulting emulsion should be acidic as many plants like the pH range of 5 - 6.5 .