When I'm doing some cleaning in my tank, all but one of my fish are fine with it. My rosy barb Elliott "attacks" my arm repeatedly while it's in the water. Obviously, it doesn't hurt me, but it does bother me because I worry that my presence is stressing Elliott out. The other fish all just avoid me, but Elliott sticks with me and nips my arm up and down repeatedly. I thought about removing Elliott while I clean, but I worry that being removed from home would be just as, if not more, stressful. Any advice?