btw, what had you been feeding them? I cut an algae wafer in half, but they seem more interested in exploring the tank right now. I tried mushroom, but can't seem to find any rubberbands, so it floated to the top.
Algae wafer, zucchini, veggie sticks all work well. They just arrived fr a long ride, so if you do feed, feed very lightly. They'll start eating again within next 24 hours.