A word of caution about some seaweed clips: I had a large tiger cowrie and a couple large Turbos injure themselves repeatedly on one. They were able to force open the gripping part with their foot to get the last scraps of food, but then the clip cut into them when they tried to pull away. It wasn't sharp anywhere, so it took a while for me to figure out that it was just caused by how much pressure it applied to small parts of the foot. After those events, I switched to using magnetic algae scrubbers to hold seaweed in place.