High Nitrite!!!

Discussion in 'Aquarium Water' started by New fish lover, Apr 2, 2010.

  1. New fish loverNew MemberMember


    I need some advice on how to lower the nitrite. My tank has been set-up for 3 weeks now. I have 2 platies and 1 guppy. Last week, I took a water sample to Petsmart and they said that the nitrite is too high that I have to do 25% water change every other day. I did the water change and have the water tested again and still pretty high. I decided to buy the API Master Test Kit so I can monitor the level myself.

    Yesterday, the readings are as follows:

    Ph - 7.6
    Ammonia - .50 ppm
    Nitrite - 5.0 ppm
    Nitrate - 10 ppm

    I did some water change again after this reading.
    Today, I did some testing again and here are the results:

    Ph - 7.6
    Ammonia - .50 ppm
    Nitrite - 5.0 ppm
    Nitrate - 5.0 ppm

    Are these numbers normal? Do I need to do the water change until the Ammonia and Nitrite go down to 0? Am I close to full cycling process? Is there any other things I can do to lower the nitrite? Based on what I have read, high nitrite is not good for the fish and I am worried that they will die. So far they seem okay.

    I appreciate any advice.

  2. LucyModeratorModerator Member

    Daily water changes will help keep the levels down until your tank finishes cycling.
    You're right, nitrites are toxic to your fish.

    With an ammonia reading, you're not totally out of the first stage, close though.

    Hang in there and good luck!

    Last edited: Apr 2, 2010
  3. navyscubaWell Known MemberMember

    The only thing you can do is a 45% or 50% water change and prime. now and do 30% to 40% till it gets better.

  4. New fish loverNew MemberMember

    Thanks Lucy & navyscuba. I will keep doing the water change.

  5. jdhefModeratorModerator Member

    The most important thing in fishkeeping to fully understand is the nitrogen cycle. I highly recommend you read up on it if your not 100% sure about how it works. If all goes correctly the words nitrogen cycle should be underlined, and clicking on it will bring you to an article that explains it.

    Good luck!
  6. jsides1979Valued MemberMember

    you will see the ammonia start to drop and the nitrite go dark purple and the water changes will help some to lower this. it may take 2- 4 weeks for that to drop. I just finished cycling my tank. Get some Tetra safe start if you can find it and add some. It will make the cycle go much faster.
  7. New fish loverNew MemberMember

    @jdhef - I am new to this hobby and have been reading some articles about nitrogen cycle and been learning a lot of information. I know that both ammonia and nitrite should be 0 but since my nitrite is too high and I have 3 fish, I am kinda worried that they may die. Seems like a lot of people advise to do the water change until the nitrite level drops.

    @jsides - Yes the nitrite in my tank is dark purple :( I am doing the water changes as advised. I am glad your tank is fully cycled :) I will try to find the Tetra safe start.

    Thank you guys!
  8. ppate1977Well Known MemberMember

    As mentioned above go get some (I use) Prime. It will lower ammonia and nitrites.
  9. jdhefModeratorModerator Member

    I agree, you really do need to get some Prime and do daily water changes using it. I think at this point it may be too late to try SafeStart.
  10. jsides1979Valued MemberMember

    i agree with JDHEF. Your getting close and when I bought Prime and added it a week later after 2 water changes it was cycled. Every time you do a water change it will stall the cycle if you take to much water out.
  11. New fish loverNew MemberMember

    Hello guys,

    Just wanted to give an update...
    I have been doing a partial water change as advised by everyone and been adding Prime every change. Although my tank still has some nitrites on it, I am so happy to see the changes... At least it's not dark purple anymore :)
    Hopefully the cycle will finish soon, cause I am so excited to add more fish.

    Thanks again for the advice!

    Attached Files:

    • High Nitrite!!!
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  12. navyscubaWell Known MemberMember

    Looks like you are getting there. Keep the good job. :;th
  13. New fish loverNew MemberMember

    Thanks navyscuba.
  14. harpua2002Fishlore VIPMember

    I agree, it looks like you're almost done. Keep up the good work!
  15. New fish loverNew MemberMember

    Hi guys,

    Here are the readings for today:

    Ph - 7.2
    Ammonia - 0 ppm (Yay!)
    Nitrites - .25 ppm
    Nitrates - 5.0 ppm


    Should I continue to do the 25% water change or let the tank continue to cycle until the nitrite drops to zero?

  16. lanlesneeWell Known MemberMember

    I have 2 fish tanks I cycled at the same time. One cycled in a few weeks while the other one is still cycling even after 3 months. I did have more fish in the other one and live plants. I also think I was too aggressive on the water changes on the one, which kept my nitrites and ammonia too low for it to cycle right.

    IMO you should do the water changes, but not too large of changes.
  17. New fish loverNew MemberMember


    I think my tank is done cycling :)
    Please confirm. Thanks.

    Attached Files:

  18. navyscubaWell Known MemberMember

    Your tank is pretty much cycled. Now remember if you are planning on adding more fish do it on a slow manner. If you add 5 or 6 fish at once it will shock your tank because is not ready to handle the waste that is been produced by all the fish. Good Luck.
  19. MeenuFishlore VIPMember

    I agree with Riv about going slowly... wait at least 2 weeks to add more fish - it'll give the beneficial bacteria a chance to establish
  20. ppate1977Well Known MemberMember

    Good job! Now you can slow down on the water changes.... if you want to. ; )

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