For Aquarium nitrate is dangerous.

Hi, I’m looking for healthy conversation.

Can anyone share about aquarium water parameters or water chemistry.

Ammonia,Nitrate is dangerous for fish.

That depends: pH (the measure of whether water is acidic) level may vary according to what aquarium fish species you have.
I know that 7.0 is considered to be neutral.

Freshwater Aquarium Water Quality: The Nitrogen Cycle & Optimal Water Chemistry

https://www.aqueon.com/articles/freshwater-aquarium-water-quality domyhomework4me.onl