Correct, by process I mean "cycle". And yeah, I'm not new to the hobby so I got the cycling thing down but I do appreciate the answer none the less. The tank is a nursery/qt for some fry so heavy feeding is a given right now, another reason the 48 hour wc. Also on a side note, when I do water changes im not using fresh water, I"m using display tank water. I know fresh water would probably be better, but my thought process is my main tank is well cycled, nitrates read at 5ppm at best at 80 degrees. So by filling the qt/nursery with tank water im really only adding in 5ppm nitrates but its a current 80 degrees (fry tank is set for 81-82) and the main tank will get the 30-40 gallons of fresh water and considering this happens every 48 hours plus my normal drip its almost more of just a holding area to keep the water warm so theres no shock to the fry.