Weird Cycle Stall?! Ammonia Down, Nitrate Up, But Nitrite Stuck!!!

Nik902

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Hey folks, really need some pointers here.

I'm doing my first fishless cycle with fish flakes, precycled/seeded bio media balls from my LFS, and Nutrafin Cycle (for whatever that's worth). Now I should start by saying I've tested my tap water which reads zero across the board. I'm on day 18 right now, and my ammonia has finally read 0ppm for 3 days in a row. I have nitrates as well at around 40ppm, but my nitrite oddly hasn't budged from 1ppm in 10 days. Is this some sorta' stall? Do I just wait, or should I try a different bottled bacteria? Kind of scratching my head here as to why it won't drop what with the nitrate presence.

Oh, pH is a steady 7.

Any thoughts appreciated.
 

Skavatar

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do a 50% water change to replenish minerals. then add some more food, try to keep ammonia around 2ppm.
 

TamiR

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Same thing happened to me, twice. But my nitrites were stuck on a huge spike (reading 5.0 all the time, was definitely higher than that). I was advised to do a 50% water change, I did that and my nitrites maybe came down to 2.0 (cant hardly tell the difference in the colors) but the very next day dark purple again. I waited another week. Still the same thing. I tried a 80% water change (got the nitrites down to like 1.0) ..next day: dark purple again. Now I was on like day 38 and I was frustrated. After reading up, it seemed that my nitrate bacteria couldnt catch up with the nitrite bacteria. So I decided to completely change out the water (it took 3 times of 90% water changes) until I read 0 nitrites. Then I got a bottle of TSS+ and my betta fish and added them both. It took 2 days from there for the tank to be fully cycled and it has been holding steady parameters ever since (about 10 days now). I am not saying what I did worked or that perhaps on day 40 the cycle wouldnt have finished on its own anyway...but all I can say is my cycle finally finished. Moral to the story, nitrite spikes are normal and can stay stuck awhile. I just finally felt like I needed to do something different to get this thing done.
 

RunsOnCoffee

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But I'm already in the nitrate phase is the strange part.
That is what it looked like with me, too. Dosed to 2 ppm ammonia and it would be gone within 12 hours but nitrite stayed high and I would get a solid nitrate reading around 80 or higher. I did water changes when nitrite wouldn't budge. If nitrite got to high I did 50% water changes. Redosed ammonia afterwards to 1ppm and waited without dosing anything until nitrites went down.

One day suddenly nitrite was gone and nitrate even further up. I redosed ammonia to 2 ppm and it all converted into nitrate within 24 hrs.

Sometimes a water change can help if things are stalled. I don't think you are stalled yet, though.
 
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