So Southern Ag Garden Friendly Fungicide, in water, only does half the nitrogen cycle, resulting in a reservoir full of ammonium.}

Is there a similarly concentrated product, plant friendly, that will complete the nitrogen conversion, turning the ammonium into nitrate, in a fresh water reservoir? A complete Nitrospira would be nice.

(Also has Rhizophagus intraradices and SLF-100 in it, just in case that matters)

Thank you.