daniella your nem will be fine its perfectly normal for clones to hide out untill they are fully healed. once it gets hungry it will move itself so long as its not being pinned to its location by aggressive fish.if it doest move coax it by useing something to shade the spot hes in and he will move to the closest possible light source around him
lol i think its the golden rule as soon as you get a clone they like naturally move to the worst possible spot they can:P