CUC resistant to predation?? FOWLR tank

[Myka]

Please give me some suggestions for some clean up crew for a FOWLR tank housing, in particular, a Harlequin Tuskfish and a Red Coris Wrasse. There is also a Panther Grouper but he doesn't bother the inverts as much as the other two. The Tusk ate the 2" Turbo Snails after he was added. Currently just a few Ring Cowries in the tank. Need help mostly with filamentous algae on the rocks - it's not out of control, but it does need help. There is some Green Star Polyps, a couple leathers, and orange Anthelia in the tank too.

 

[saltyfilmfolks]

snails and pods.
https://www.reef2reef.com/threads/choosing-cleanup-crew-critters.258695/

 

[Feet4Fish]

Long spine urchin

 

[Myka]

Long spine urchin

I was thinking to add a couple of Tuxedo Urchins. I have yet to meet a reef-safe Long Spine Urchin - many of them love eating Anthelia, that's why I mentioned the Anthelia in the tank. I suppose I could try one and see if it goes for the Anthelia or not. What is your experience with Long Spines?

snails and pods.
https://www.reef2reef.com/threads/choosing-cleanup-crew-critters.258695/

Thank you for the reply, but I'm looking for someone with experience with these types of fish. Snails and pods are no match.