Have a rainbow nem that’s kinda in a weird spot and getting too big for his britches. I tried pointing a small powerhead at them to entice them to move and that didn’t really work. I had it on it for about a day. It just shriveled up but didn’t move. Does anybody have tips or tricks? I heard ice cubes and I tried that but it melted way too fast. Maybe I need to leave the power head on them for a little longer? Trying to avoid taking the rock out to hang it upside down.