Snowflakes are basically reef safe, though they may eat ornamental shrimp and some small fish if they are hungry. They should leave corals alone. Turbo grazer is normally a marketing term related to any number of snails usually either Astrea or Trochus species. There is a Mexican Turbo called Turbo fluctuosus which is often found in the hobby, so Turbo is a real name, but its most often misapplied to Astrea or trochus snails.
