I added a GBTA about three weeks ago- and it has not stopped its rambling as of yet. I have had a ton of these things and usually within a week they are settled. This one will go down in the rock for a day or two- then be out in the light, only to disappear overnight back to another deep spot. I could understand it looking for light and flow, but it has no real pattern to where it decides to hang out- sometimes surface- sometimes bottom. Looks great and feeds well- but you can imagine the worry over the corals in the tank with this thing barnstorming all day and night. any ideas on how to shut it down?