Are my Nitrates going to drop ever?

[Mike7744]

I have a 165 total gal aquarium. I recently started growing Sea lettuce. I now have a 15 gal aquarium full of Sea lettuce in my refugium. I was expecting to see a drop in nitrate, but I have not. Still showing 50.
I'm using RedSea test.
Anyone know when i could see a drop in Nitrates.

 

[Hairyteeth]

Remove some sea lettuce, some nitrates exported

 

[Randy Holmes-Farley]

Are you tracking phosphate?

Adding trace elements?

If these others drop to critical levels, the macroalgae will be limited.

By Sea Lettuce, do you mean Ulva? That's what I use and I have to dose N (not P). I have it in quite bright light.

 

[Mike7744]

Are you tracking phosphate?

Adding trace elements?

If these others drop to critical levels, the macroalgae will be limited.

By Sea Lettuce, do you mean Ulva? That's what I use and I have to dose N (not P). I have it in quite bright light.

I decided to take it off line, it was becoming quite messy not working as well as i had hoped

 

[Randy Holmes-Farley]

OK, thanks for the update. :)