Harlequin tusk and algae issues

[Hexagon Mop]

Hello all. How is everyone keeping algae in check in their tank with a h. tusk? I have a fairly large clean up crew (snails, hermits, t. snails, emerald crabs, lawnmower blenny) and I would like to add a tusk. I know I have a sacrifice the smaller snails and hermits. The t. snails and emerald crabs are pretty large and I hope that the tusk won't go after them. If he does, how do I keep the algae down if the tusk eats everyone? I have a 6-7" naso but he doesn't pick the rock very much. I have a Carribean tang in qt now so I'll have the naso, c. tang and lm blenny. Aside from adding more tangs, what are my clean up crew options?

Thanks
Jeff

 

[MrTuskfish]

An HT will certainly eat your CUC, small fish too. I don't have any inverts in any of my FOWLR tanks. Keep nutrients & lighting down a bit, good circulation & filtration, etc. A CUC certainly isn't a necessity; there are lots of fish that will eat any snail, crab, etc. My tusks would love an emerald crab for lunch.