Just keep an eye out on it and see what it does throughout the day. It is going to need time to adjust to the tank and new surroundings. As stated they are not fast swimmers. They more or less float, hover, bob, and weave through rocks and crevices looking for the right size Aptasia or making a second pass at the larger ones. It isn't really a single setting that they eat so they are always moving. But their movement is slow unless they are being chased or there is a threat.
I have one in a 210 and it is rather interesting to watch. It is always around the rocks, hovering, doing its thing and then all of a sudden one of the Sea Swirls direction hit him or her and it floats over to the next rock structure all the while adjusting control to swoosh over corals, rocks, and whatever else. Pretty interesting fish but they have a way they move.
