Why Isn't My Tank Cycling? Question

Discussion in 'Aquarium Nitrogen Cycle' started by Esli, Jun 23, 2018.

  1. EsliValued MemberMember

    I have done 2 major water changes yesterday, and today because my tank has been at super high nitrites and nitrates for a week now. And they dont seem to be going down, can anyone tell me why ?
    This is going on to the 4th week of cycling.
    The third week nitrites and nitrates were present, super high. My ammonia is being processed under 24 hours, maybe even less.
    My tank is a 125 gallon.

    Attached Files:

  2. AquaticJFishlore VIPMember

    That’s normal. There are two separate bacteria, one turning ammonia into nitrite (which you have already), and the other turn nitrites into nitrates (you have some). 4 weeks is average, it can be longer, it can be shorter. You’re going to be done real soon it looks like.
  3. EsliValued MemberMember

    Maybe hopefully one more week right? I want to move them to their new home already!
  4. AquaticJFishlore VIPMember

    I would think so! You’re definitely at the end. What are you dosing ammonia to?
  5. EsliValued MemberMember

    Ive been dosing to between 2ppm and 4ppm.
  6. AquaticJFishlore VIPMember

    Stick with 2, you’re making about 12 ppm of nitrites when you dose 4 ppm of ammonia, that’s a lot and will make it take longer.
  7. EsliValued MemberMember

    Oh I did not know that! Thank you!!

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