Two days ago, I removed all of the carbon from my tank and now my nitrite is over 2.0! This will cycle out soon enough, am I correct, or did I throw the balance of the tank off for good? I am soon going to be adding a Magnum 350 to the tank to held my two Penguin 350s. Also shocking was nitrite at 30 ppm, when it is usually 0. This should be fixed soon, because the Purigen was just recharged and last time it brought it down from 40 ppm to 0 ppm. Should I worry about the nitrites? They will drop soon I am hoping, am I correct?