General marine chemistry questions

[35gcube]

Good day, I don't have much knowlage as a begginer and I have some problems finding the answers online. I would be more than happy if somebody helped me.
1. Is PO4 connected to NO2 and NO3? If I have 0ppm phosphate will my nitrates and nitrites rise?
2. My local fish store told me that I will need to feed my bacteria in the future. Is it true? I think they feed on the nutrients, don't know why to give something more.
3. Vodka and nutrients, how does that exactly work?
Thank you.

 

[fishyjoes]

1. Phosphate does not directly influence nitrite or nitrate (guessing that's what you mean).
2. No idea what they're talking about. What was the context?
3. "vodka dosing" is a technique also known as "carbon dosing" which can be used to reduce nutrients by feeding bacteria.

What are you actually trying to achieve with these questions?
Do you have an aquarium already and don't know how nutrients work or are you trying to figure out how to get started?