Folks, if you've recently upgraded or renewed your annual club membership but it's still not active, please reach out to the BOD or a moderator. The PayPal system has a slight bug which it doesn't allow it to activate the account on it's own.
Watch this video - I bought an NSA rockscape from a guy on Manhattan Reefs and he used this technique to make his. He sent me this link and I'm going to try it myself for my new 220.
You should get a clam cradle - clams have a foot that they use to attach themselves to a substrate. If you move them, it rips the foot and the clam dies. If you put them in a cradle, they attach to the cradle and you can move them.