livestock ?

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ok, my tank is cycled now ammonia=0 nitrite=0. my question is as follows. should i now add a clean up crew? if so, do i have to add them slowly or can i just put them in? i have a 33 gal with 40lbs of live rock. i was looking at some blue hermit crabs, 2 emerald crabs, and 2 turbo snails. also, should i wait a while after adding the cleaners until i pick up my clowns(2)?

33gal
bare bottom
40 pounds of LR-fiji, indonesian, vanuatu
seio 1100, 820
remora
coralife aqualight 2x96 w/lunar
ammonia=0
nitrite=o
SG=1.023
temp=81
nitrate=0-5
calcium=380

-paul