My fish took some time to adjust to their new home, barely touched food for about 5 days. I didn't light the QT only used ambient light. Make sure you aren't turning lights on and off regularly on a night either, I found this caused them to hide more. Leave a lamp on in the same room fairly near the tank. Keep a clip of nori pinned in the tank for a few hours and check once an hour to see if any has been eaten, try not to be walking around the tank too much, cause as little disturbance as possibleIts been in qt without copper for 3 days. Hasnt eaten since i got it