Re: Random questions about shisha....
Everything BH said is spot on. I should ad that you should check out the Hookah Pro videos at youtube as they've got a ton of info for people just starting out.
I should mention that you should always use high quality coals ( natural ones like Forani and Exotica are best ) and wait for them to become fully lit before using. Check out the tips section at hookah-life.com for lots of good suggestions. You also should get a high quality hose like a namoor and clean it often if you want good results.
Last and most important thing to remember is carefully clean everything after every use.