Perpetually "half-cycled" Fluval Edge
I've got an interesting problem.
Fluval Edge-6 Gallon
Substrate: Fluourite Red+PFS here and there.
2 small Amazon Swords and a few wimpy ludwigia repens
1 Betta, 2 Serpae tetras (I know, I know, but they were all that survived a bad tank crash and I didn't have anywhere else to put them while that tank re-cycles...its interesting how wellm they've done though, considering that the Betta is a known killer of tetras)
NO2-OFF THE CHART. Deep purple on API test
This thing has been running now for nearly 6 months. I have tried everything...the ammonia stays down, but the nitrites never do anything but build up in the tank. I have squeezed out filter media from my aquaclears on established tanks into this one, and have even tried literally swapping out the filter media from an aquaclear 20 in an established tank.
The cultures that break down the nitrite don't seem able to survive in the tank, but the ones that break down ammonia are present and doing their job. I'm out of ideas about what could possibly be causing this.
This is my first nano, but still, it seems like others have had no trouble getting these things cycled.
I can do a massive water change, but a couple days later the nitrite is off the scale again. Ammonia stays steady. After half a year, this routine is getting old.