Clean up crew question?

[bavass]

I am going to be ordering a clean up crew/sand bed stirring crew, and a pollution prevention team and I wanted to get your opinion on it. It is for a 55g reef with 90lbs of rock. The list is as follows and most come in a package. Should I add or subtract anything, substitue?

Sand bed stirring team
15 cerith snails

Algae away team
8 Scarlet Hermits
15 Zebra Reef Hermits
15 Margarita snails

Pollution Prevention Team
1 green brittle star
1 emerald crab
1 sally light foot crab