High phosphates low nitrate, what to do?

[RyvBoy]

In my 25gallon tank after 3 months I see 0,3 phosphate and 2 nitrate.

 

no real big problems in the tank, but there are some cianos, algae on the glass to remove almost every day and my lps not opening very well...

 

[Christopher Marks]

What kind of filtration does your aquarium run? Any filter media in use? What is your water source when you replace water during a water change?

[RyvBoy]

Tunze 9004 DC

Using carbon right now as filter

water source from reverse osmosis

[William]

You can dose potassium nitrate to bring your nitrate level up. 

 

“Tree stump remover” on amazon is potassium nitrate 

 

keeping your nitrate in the 1-5 (ideally 1-2) range is best IMO. 

 

[RyvBoy]

how much should I bring up the nitrate? 

 

thanks

[SliceGolfer]

New tank jitters for certain. My tank just hit 4 months and I finally can go a week without scraping the glass.

 

2ppm Nitrate is fine. It’s measurable, meaning you have extra nitrate that isn’t being consumed by corals or algae. 0.3ppm Phosphate is on the higher side. If I was trying to lower P04, I would do it slowly, with absorption pads or Chemipure blue. And I would target 0.1 max.

 

We don’t know your tank or livestock, so any recommendations are premature. I would say that a DKH of 7.3 and Mag of 1170 are on the low side. Again, each tank is different.

 

More information and your tank goals will help with the discussion.

[RyvBoy]

what informations could help?

[Gravity]

You could also use some granular ferric oxide (GFO) to help remove the phosphates.