here's some links for reading:
http://saltaquarium.about.com/c/ec/1.htm
http://www.saltwater.8m.com/filter.htm
http://saltaquarium.about.com/
as for the crushed coral, thats what i have in mine. some like sand, some like bare bottoms.....
as for fish, you'll need to wait till your tank has cycled some, to be on the safe side, 2-3wks. even though the live rock is cured, you'll get a small cycle.
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tanks:
120g w/starphire front, pm bullet 2 skimmer, yellow tang, emperor angel, niger trigger, spotted hawkfish, blue tang, flame angel and 120lbs lr
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