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Old 11-03-2012, 10:45 AM   #1
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Cannot get Nitrates under control

Issue:
Nitrates 40+ppm

Tank:
120g Mixed Reef / Fish
  • Firefish Goby
  • Orange Spot Goby
  • Yellow Belly Damsel
  • Orange Clown
  • Black Clown
  • Eyelash Lawnmower Blenny
  • Purple Sea Urchin
  • Sandsifting SeaStar
  • Crabs
  • Snails
  • Various Corals - SPS/LPS

Display Equipment
  • (3) 1050 Hydor Koralia Powerheads
  • (2) Return Lines

30g Sump Sump Photos
  • NWB150 Reef Octopus Skimmer
  • Live Sand
  • Live Rock
  • (5) Various Macro Plants

All Powered by a ReefKeeper System

pH: 7.9
SG: 1.026
Am: 0
Nitrite: 0
Nitrate: 40+
Ca: 440+

Lit by a Odessea HO/T5
(2) 10,000k 48"
(2) 450nm Actinic 48"

------------------------------------------------------

I have performed 4 water changes in the last week.
(3) 25 gallon water changes
(1) 35 gallon water change

My Nitrites will not go down.

Any suggestions?
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Old 11-03-2012, 10:47 AM   #2
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Are the water changes with ro/di? How much are you feeding?

If you are using ro/di and feeding sparingly, then it might be worth looking into a reactor to run GFO on your system to bring your nitrates down.
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Old 11-03-2012, 10:55 AM   #3
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GFO only removes phosphates. But if your nitrates aren't going down with that many water changes you either have a bad test or aren't using pure water. You need to use RODI water which has 0 TDS resulting in no nitrates, ammonia, nitrites, phosphates, copper, etc. in other words, you need to add pure water for your tank to have pure water.
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Old 11-03-2012, 10:57 AM   #4
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RO/DI

Of course im using RODI.
I use RedSea Coral Pro Salt
I have tested with API Nitrate Test Kit
and
RedSea Nitrate Pro Test Kit.

Both give me the same results.
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Old 11-03-2012, 11:00 AM   #5
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If your using Rodi and the filters aren't all gunked (whens the last time u replaced??) there are only two thibgs that could be happening. 1. Both of your tests are either too old or bad (tests can expire) 2. Your testing wrong. You can't replace 25% of 40 with 0 and get 40. It's not possible.
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Old 11-03-2012, 11:01 AM   #6
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RO/DI

Of course I'm using RODI.
I use Red Sea Coral Pro Salt
I have tested with API Nitrate Test Kit
and
Red Sea Nitrate Pro Test Kit.

Both give me the same results.

I have had a chocolate starfish in my sump, but i think he went through the pump. would have merely been fish food at that point, but that's awhile ago. I wouldn't imagine that would be a problem anymore.
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Old 11-03-2012, 11:02 AM   #7
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It wouldn't because it's not physically possible to add less and get the same. It's not. Either your tests are bad, you're testing wrong, or your Rodi filters are bad.
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Old 11-03-2012, 11:04 AM   #8
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Replaced all filters and membrane last week,
and the Red Sea Nitrate Pro test kit came the same day. it expires 04/2014
api test kit expires 03/2017.
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Old 11-03-2012, 11:06 AM   #9
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I know i changed A LOT of water yesterday and its high. Doesnt make sense. Im doing another wc today. another big one. well see what happens i guess. I am def. going to get a reactor.
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Old 11-03-2012, 11:22 AM   #10
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Quote:
Originally Posted by ReeferRusty
I know i changed A LOT of water yesterday and its high. Doesnt make sense. Im doing another wc today. another big one. well see what happens i guess. I am def. going to get a reactor.
How much food do you feed them? Do you use supplements?
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