Correct. Here's your conversion numbers: 1 ppm ammonia --> 2.7 ppm nitrite --> 3.6 ppm nitrate. So if you dose 2 ppm ammonia, you'll yield 5.4 ppm nitrites. If you're below that within 24 hours, it means your bacteria is starting to convert that to nitrates. You just need to keep feeding ALL the bacteria until you have 0 ppm ammonia and 0 ppm nitrite within 24 hours. So keep dosing 2 ppm ammonia daily, checking both nitrites and ammonia daily and on, lets say day 6, check to make sure nitrates are at or below 20 ppm. If they're close, do a water change and keep going with the ammonia dosing.