View Full Version : Nitrogen Cycle Thoughts

01-04-2007, 03:37 PM
Okay, I have read that it takes weeks and even months for the Nitrogen Cycle to come to a balance in an aquarium. By balance I mean 0 Ammonia, 0 Nitrite. Is it possible that the balance can take many months or even years to become as stable as it could possibly be?

Before I change my water my nitrite is 0, the next day after the water change/vacumming nitrite is .25.

01-04-2007, 09:39 PM
How long has the tank been set up?
How heavy is your bio-load?
How big is your tank?
What is your water change schedule?
Just nitrite? No Amonia?

Normally a tank is fully stabilized in about a year.

01-04-2007, 10:36 PM


My 55 tank (the one I have the most problems with) has been setup roughly 3 months.

Tap water tests .75 ppm ammonia. I am now using prime and added a Penguin 350.

Maybe I just need to be patient.

01-05-2007, 12:26 PM
Since your tap water has ammona in it, your nitrites should also rise after water changes due to the excess ammonia being turned into nitrite. Once the bacteria eat up the excesses, your getting the readings back to 0.The prime should help reduce its toxicity.

01-05-2007, 02:47 PM
Yes, but an established tank can handle Amonia in the tap and not bat an eye.... I think you're still having the occasional mini-cycle as a result of both the amonia in the tap and a bio-logical filter that has yet to stabilize.

01-08-2007, 12:01 AM
Don't forget that if the ammonia is high enough for a sustained period it can hurt the nitrite oxidizing bacteria...