I've noticed that my trochus snails, all 3 of them, seem to like hanging out on the stalks of my hammers and frogspawn. Issue is, the corals absolutely do not seem to appreciate this. Is this normal? I assume they're on there to graze algae, but I have plenty of algae elsewhere for them to graze. Hell I even left the glass alone so they could have some food. Should I knock them off or just let them be? Anybody ever have large snails develop a taste for Euphyllia flesh?