I have a seabae that is about 12 in in diamater. Ever sence I rearanged my tank about 3 weeks ago he has been on a hike. It has never done this before even when I transfered the tank from my father-in-laws. It never was bothered by the 2 different bulbs 10k and 20k(due to finances). Anybody have any idea what to do to get him to stay put. it has stung alot of coral on its trip and it is getting old. I did switch the bulbs 2 days ago and the 20k is above him now so hope that works. Any suggestions???