Manure tea

I have a question about brewing manure tea. I was brewing some alpaca manure tea, it has been brewing for 24 hours. It had a lot of foam, and I decided I would add in a little bit of some Alaska fish fertilizer. I was hoping to add some extra micro organisms to the tea. Almost immediately after adding the Alaska fish fertilizer to the tea all the foam disappeared. Did adding the fish fertilizer kill off my micro organisms? Why did the foam dissappear?