Nitrate & Phosphate question

[BantyRooster97]

So I have a 105g (& 40g sump) mostly SPS tank. Most of my corals are doing ok, slow growing. My Alk is pretty stable around 8 (Hanna), Cal 428 (Hanna), Nitrate 0 (Salifert) & Phosphate .25ppm (Salifert).

Is .25 ppm phosphate too high? I recently added 5 fish (I now have 12 in my tank) to try to raise my nutrients. I'd like to raise my nutrients naturally but not sure how to raise nitrate & not raise or lower phosphate (if needed).

thx

 

[Randy Holmes-Farley Verified Community Expert]

Too high is a relative term. I wouldn't raise phosphate, and I would dose sodium (or potassium) nitrate, which may also allow phosphate to fall a bit, which may be desirable in some ways.

 

[BantyRooster97]

What would be the best source for the sodium (or potassium) nitrate?

 

[Randy Holmes-Farley Verified Community Expert]

What would be the best source for the sodium (or potassium) nitrate?

Buying sodium nitrate. For example:

https://www.amazon.com/Science-Comp...id=1522274221&sr=8-10&keywords=sodium+nitrate

 

[BantyRooster97]

Should I buy food grade or reagent grade?

 

[Randy Holmes-Farley Verified Community Expert]

Either are perfectly fine.

 

[BantyRooster97]

Thank you!

 

[Randy Holmes-Farley Verified Community Expert]

You're welcome.

Happy Reefing.