I have a BTA and it has been doing great. It stayed where I put it from day one and was eating every couple days. Now I wonder if I should move it. What is happening is my LR is basically a facde over a PVC and eggcrate structure. The underside is open so fish can swim in and out under there as well as on the outside. The nem has retracted and is opening up mostly to the underside now where it will get little to no light and it would be hard to feed him. I have waited for about a week now to see if it will turn back around and come back out, but it appears like it may be stuck, although he hasn't really moved rocks from the start. Should I continue to wait or move the rocks around so that he cannot get back to the underside again?