I put a Melanurus wrasse in a 10 gallon QT with a fine sand box in a shallow Tupperware container 10 days ago. For the first few days I could catch him swimming and get some food in him (I think) but would hide pretty fast. Now he is buried round the clock and haven't got him to eat for at least 5 days. I flushed him out of the sand yesterday to make sure he was still alive. Should I remove the sand box hoping for a better chance to feed him?