50 gallon reef setup

Ok so for christmas I'm getting a 50 gal tank

I will be getting 18 kg of marco rock and arag alive sand
stocking list
varius snails and crabs
cleaner shrimp
blood shrimp
pistol and goby pair
algae blenny
6 line wrasse
coral beauty
2 o clownfish
azure damsel
shoal of chromis

would like any input on what anyone things off this and or my stocking list

thanks