Clean Up Crew

[DomG]

Ok Gang I have a new 90 gallon on the go ill be stocking it soon, obviously i wont need a clean up crew right away but I should start planning this out.

1 Lawnmower Blenny (M 2"-3")
8 Astrea Snails
8 Nassarius Snails
1 Emerald Crab
10 Red Leg Hermit Crabs
1 Electric Blue Hermit Crab
Cleaner shrimp ?

I hear crabs are bad but if you keep them fed they are fine, Thoughts?