So I'm about a week into the cycle and I had added some old filter media from a friends tank. It reads around 1ppm for ammonia 0 Nitrites and 8ppm nitrate. My question is that before adding the old media th tank was sitting at 5ppm ammonia and 0 Nitrites and nitrates, was there just enough BB to convert just a little bit of ammonia at a time? Is that why I don't see any nitrites? Should I just wait till it can cycle all the ammonia overnight and then just only add what it can cycle overnight or should I still try to keep it at around 2-4ppm?