Jenste
Resurrecting the Passion of Fishkeeping
no - - what you are doing is removing a lot of bad bacteria while waiting for your beneficial bacteria to start growing - - it takes a while for the beneficial bacteria (nitrates) to catch up enough so that it can process the ammonia and nitrite...by doing water changes you are removing the amount that cannot be processed, then giving the nitrate a change to catch up with the new ammonia that is going to be added by the fish.
when you have a long series of "0" readings, it means enough beneficial bacteria has grown in your filter to handle the bioload (ammonia and nitrites) that your current fish are producing
when you have a long series of "0" readings, it means enough beneficial bacteria has grown in your filter to handle the bioload (ammonia and nitrites) that your current fish are producing

also feed lightly