How amny hermits for a 3g?

[blackjacktang]

I am going to get some red legged hermits today. I need to know how many. Here is my current stalk list.
1 big, 1 medium, 1 small xenia (Splited)
Cleaner shrimp
Wierd bug things that have 8 or 9 legs (20 of them)
candy cane coral
1 small mushroom coral
3 turbo snails

 

[clownfish11]

i would get like 4-5 blue leg hermits reds are meanies...so are blue, but its up to you