I had a
flame scallop for 18 months. I would target feed him DT's and blender mush every other day. Sometimes I would take him out and put him in a bowl and drop in some DT's and let him filter it out for about 5 mintues and then put him back in the tank.
He moved around a bit and preferd a spot under a ledge, they are not lovers of light. They will kick up some sand and stuff and might even put themselves in a spot in your tank that will iritate you.
I lost mine to overheating in my tank. I probably wont get another one. But he was nice while I had him.
They take alot of time and care. So if you are not willing to put in the extra time to feed him, dont get him.