Nitrite spike!

[Emma1900]

Hey guys I have a 40 gallon breeder that I “instant cycled” with filter media and some rocks from my established tank. But about 3 days ago I tested and it said 0.25 nitrite! I did a 20% water change, added seachem prime, and API quick start. Nothing worked and my nitrite is still at 0.25. I have nerite snails in there, will this harm them? What do I do to get rid of it?

 

[Fishmanic]

You'll need to do at least 50% water changes daily until nitrites and ammonia stay at 0. Also check nitrates...you want nitrates to be 20 ppm or less.

 

[Sgooosh]

you can move the nerite snails to an old tank, they can live there for a while. it is best not to expose them to these things