I keep seeing emeralds at the LFS I may just have to get one.Usually fox face is recommended but they get spoiled and don’t do what they are advertised to do. Emerald crab eats it for sure but takes time.
My Purple tang is an a. S. S. Adding a fox face may not go well….. that and the current tank is only a 75….even the 100G may not provide enough space for the purple, the tomini, and a fox face