Is it attached to something now? I usually put my Nems on slotted basket for something to hold on and it enables them to "stand", ready to receive light rays. They like to burrow on the sand and attach to something under the sand, but it might have no extra energy to do so during acclimation, that's why I prefer to put them on the slotted small plastic basket. Easy to move around and I can put it higher towards the light.