Trochus Snails known for their hearty appetite for nuisance algae. Similar in shape and size of Astrea Snails, yet with the advantage of being able to self right when tumbled. No need to constantly check your tank and flip snails to avoid death by drowning. Capable if reaching 2” in size, Trochus are not known as bulldozers as Turbo Snails often are. But any snail can tumble frags and smaller rocks that are not properly secured.