!!??!!
Whoa there Big guy.
2 weeks?
My personal opinion? Wait untill you have some algae growth. What are they gonna eat in a 2 week old tank?
O, I see, your going to feed them. So If im a crab or snail, and I'm getting 3 hots and a cot, why would I go out looking for food and actually clean algae off the tank and sand and rocks?
I usually wait untill my new tanks resemble the presidential rose garden before I introduce any snails and crabs.
Then go with one Blue legged hermit per gallon, one scarlet reef hermit per every 3 gallons, one emerald crab per every 10 gallons, and one 1 snail per gallon.
But once again, wait untill your tank matures and stabalizes a wee bit.