Stalled nitrifying bacteria cycle - The Planted Tank Forum
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post #1 of 2 (permalink) Old 07-25-2020, 01:18 AM Thread Starter
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Stalled nitrifying bacteria cycle

I am having trouble cycling my tank and have stalled at the nitrifying bacteria phase, my ammonia is 0, and my nitrities are doubling daily. In an attempt to restart/complete the cycle (after daily water changes to reduce nitrites) I have turned off my CO2 to raise the pH closer to 8, raised my temp in the tank to 84, adding Seachem Stabilizer daily, and turned of my Finnex 24/7 Planted light. Do you have any other suggestions, it's been 10 days and no dip in nitrites other than from my water changes? I am desperate!!!!!
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post #2 of 2 (permalink) Old 07-25-2020, 01:40 AM
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Originally Posted by hitechVONN View Post
I am having trouble cycling my tank and have stalled at the nitrifying bacteria phase, my ammonia is 0, and my nitrities are doubling daily. In an attempt to restart/complete the cycle (after daily water changes to reduce nitrites) I have turned off my CO2 to raise the pH closer to 8, raised my temp in the tank to 84, adding Seachem Stabilizer daily, and turned of my Finnex 24/7 Planted light. Do you have any other suggestions, it's been 10 days and no dip in nitrites other than from my water changes? I am desperate!!!!!
Good on the pH and temp. Don't reduce nitrites (see below).

Cycling is a two-step process. You are only through the first step. You need two types of BB. The first type is called nitrosomonas (and some other things). It converts ammonia into nitrite, but doesn’t do anything with the nitrite. The second type is called nitrospira. This eats the nitrite and converts it into nitrate. You haven’t developed enough of the second type yet. Make sure your pH stays between 7-8 (by adjusting your KH – bacteria consume the carbonates), keep temperature between 85F-95F for fastest response and oxygenate heavily, particularly at higher temperatures. Keep feeding ammonia until you add fish. When nitrites drop and nitrates appear, you are cycled and can do water changes to reduce the nitrates before adding fish.
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