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Old 05-16-2020, 10:37 AM   #1
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Nitrite spike when stocking

Hi all,

I added another few fish today (at my tank capacity now). Before doing so, my nitrates were at 40ppm so I did a water change and got this down to 10ppm. There was no ammonia or nitrites.

Since I did the water change (around 20%), I planted some plants (anubius, java fern etc) and added 6 neon tetras. All of a sudden i have noticed a slight nitrite spike coming in at 0.25ppm. I don't want my new tetras or indeed existing tank mates to suffer here. Is it possible when I planted the plants that I disturbed the substrate enough to release some decaying food/biomass and this has led to it? I also planted 2 fertiliser captures in the substrate to help the plants. Not sure of that would have made a difference. Lastly, I added 5 ml of fluvial bacteria booster as it's been a while since I added any and it says to add weekly.

Would another water change sort this? It's the first time since I fishless cycled the tank that I've had a reading showing any nitrites hence why I'm unsure what to do.

Thanks.
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Old 05-21-2020, 08:39 PM   #2
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I would leave it for a day, than check again, sometimes the tank will just sort itself out and stabilize. If not, do small water changes until. Hope i was of some help!
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