Need some cycling advice

[CatatonicBug]

WooHoo!! My tank FINALLY has zero ammonia! However, I still detect zero Nitrites. Is that ok?? I have never found any nitrites in this tank at any point since I began testing. Of course, it has been running for quite a while. Is there a chance that the Ammonia-eating bacteria were lost when I removed the filter (and started a mini-cycle), but the Nitrite-eating bacteria remained in the tank?

[Purrbox]

Perhaps you have a bad Nitrite Test Kit. Check the date to ensure that it isn't expired. Check the Nitrates to see if they're rising. As long as Ammonia and Nitrite (may want to have LFS double check the Nitrite results) are 0 and Nitrates are rising you're good to go.