Yes,that is what I am saying. I did remove all carbon. In fact, I had several bags of carbon that I forgot about in my 'fuge. Once I removed them the pace of Nitrate reduction sped up. Keep a daily log for reference. If you're like me you will forget what you did a few days back. This way once you have Nitrates at what you want, a balanced daily dose can be configured. As far as adding carbon back in, I don't know since it will remove the NoPoX.
I don't do any wet skimming since the removal of that much water will change your chemistry. I'd be interested to see if that makes any difference.
If you search the 'net for carbon dosing or Vodka dosing, you will find lots of information that you can glean.
As a side note if you want to also reduce your Phosphates, NoPoX will do that but it takes a longer time to do so.
Jerry