They will move themselves to a place they are happy with. You might give it a few days to see if it moves itself. It is possible to damage thier foot if you try to move it by scraping it off and then most likely it will want to move from where you put it anyway. Our GBTA moved all the way across the tank and ended up on a rock we didn't really want it on, as it killed some blastos which were there first. Anyway maybe move your Koralia and play with your flow some after it settles... Mike