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Old 02-06-2010, 08:53 AM   #1
zy
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How to reduce NO3 (Nitrate) Level


Hi fellow reefers,

4 weeks ago, I managed to reduce the No3 (Nitrate) level from 160 ppm to below 20 ppm by changing 80% of the water. Recently, the No3 has been staying at around 10 ppm.

How to further bring down the No3 level? I understand that the Nitrate level needs to be near zero for the best health of corals, particularly I wish to add some stony corals in my tank.

Tips/advices are appreciated!
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Old 02-06-2010, 08:58 AM   #2
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Are you using RO/DI or Distilled wate for your WC and top-off?
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Old 02-06-2010, 09:01 AM   #3
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How long was it before this water changes to get your levels that high?
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Old 02-06-2010, 09:09 AM   #4
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If nitrates are in your tank, your options are:
1) remove then via water changes, where the replacement water has zero nitrates. This is an on-going cost to get RO/DI water or "scrub" your make-up water with a phosban reactor.
2) rely on the anaerobic bacteria inside "live rock" to break down the nitrate into nitrogen (which escapes out the top of the tank). This is a one-time cost to purchase the rock.
3) add macro algae, such as chaeto, either in the display tank, in a refugium, or both. This is a one-time cost. If it is only in your display tank, it is also an inexpensive (under $20) one time cost.
4) (and the most involved, in my opinion) add at least 3 inches of fine sand that will harbor anaerobic bacteria to convert nitrates into nitrogen (same as option 2). This is a one time cost, but also involves a full make-over of your tank, unless you do this in a sump or refugium, which further adds to the cost. This option can be a bit tricky to work well.
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Old 02-06-2010, 12:12 PM   #5
zy
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Thanks for the tips;


1)I have always used RO water;
2)I have about 80lb of rock in my 65 G tank;
3)I have about 2 inch fine sand in the tank;
4)I can try the macro algae option and see how it works.
> >
Honestly, I am not totally sure why the nitrate level went that high last time. I guess one reason being water change. Anyway, over the last 4 weeks since I conducted that massive water change, the nitrate level has been staying around 10 ppm and I have been changing about 15% water every two weeks.
> >
I really want to bring the nitrate level further down to below 1 ppm so that I can add some stony corals in the tank.
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Old 02-06-2010, 01:33 PM   #6
bcrum51
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15ppm isnt bad its actually better then alot of folks when someone comes in for a test and there nitrates test really lower then I begin to wonder whats goin on haha
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Old 02-06-2010, 07:31 PM   #7
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Are you using bioballs/canister filter/HOB filter with biowheel?
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Old 02-09-2010, 08:21 PM   #8
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Yes, I have a HOB filter with biowheel as well as a skimmer.
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Old 02-09-2010, 09:39 PM   #9
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Trash the biowheel, and any other "trickle" type media. They are nitrate factories.
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Old 02-09-2010, 11:15 PM   #10
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Quote:
Originally Posted by zy View Post
Yes, I have a HOB filter with biowheel as well as a skimmer.
That's probably the cause of your nitrate issues...

Quote:
Originally Posted by Elegance Coral View Post
Trash the biowheel, and any other "trickle" type media. They are nitrate factories.
Agreed... They are designed to do one thing, convert waste to Nitrates. They are very effective at that task
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Old 07-30-2011, 08:23 AM   #11
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So bioballs r nitrate factories as well, correct?
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Old 08-19-2011, 04:04 PM   #12
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I've used Algone pouches in my freshwater tanks and it is also safe for Saltwater, reef..etc. I too am trying to bring down Nitrate levels in a used 125g tank I purchased. I brought all the water (siphoned into large bins) and live rock back with me and used it to fill the tank. I've done several water changes (20 gals each time). I've also read about the "Vodka Method" where you add 1.2ml of 80 proof vodka to the tank over the course of a few days to reduce nitrates. Tried and tested by some Marine Biologist. I will post back once the Algone has been in there a few days.
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Old 08-19-2011, 09:00 PM   #13
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Quote:
Originally Posted by Ace Brown View Post
So bioballs r nitrate factories as well, correct?
Thats a big 10-4
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Old 08-19-2011, 09:02 PM   #14
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Quote:
Originally Posted by Cliff_Diver View Post
I've used Algone pouches in my freshwater tanks and it is also safe for Saltwater, reef..etc. I too am trying to bring down Nitrate levels in a used 125g tank I purchased. I brought all the water (siphoned into large bins) and live rock back with me and used it to fill the tank. I've done several water changes (20 gals each time). I've also read about the "Vodka Method" where you add 1.2ml of 80 proof vodka to the tank over the course of a few days to reduce nitrates. Tried and tested by some Marine Biologist. I will post back once the Algone has been in there a few days.
I still Vodka Dose my tank. And if your trates are really only 10, then it won't take much of a daily dose to wipe those out easily.
http://reefkeeping.com/issues/2008-08/nftt/index.php
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Old 08-19-2011, 09:06 PM   #15
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Quote:
Originally Posted by Cliff_Diver View Post
I've used Algone pouches in my freshwater tanks and it is also safe for Saltwater, reef..etc. I too am trying to bring down Nitrate levels in a used 125g tank I purchased. I brought all the water (siphoned into large bins) and live rock back with me and used it to fill the tank. I've done several water changes (20 gals each time). I've also read about the "Vodka Method" where you add 1.2ml of 80 proof vodka to the tank over the course of a few days to reduce nitrates. Tried and tested by some Marine Biologist. I will post back once the Algone has been in there a few days.
we have an active carbon thread going on right now here...
http://www.thereeftank.com/forums/f6...re-171900.html

also Welcome to TRT!
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