I was traveling Friday-Sunday, checked nitrates, 0. Did small water change and add 15 pumps of easy green. Nitrates 0. waited 2 hrs added 20 more, 0. waited 4 hrs and added 20 more, it was around 5. Checked this morning and added 20 more. I will check tonight. I plan on keep adding slowly until I get around 20 PPM. I will also watch the TDS and not allow them to get too high.
I have to assume the plants are taking it in as fast as I add it. This is also a large volume of water but still, that is a lot of easy green.