moved to reef forum
First off Welcome to Canreef!!
Secondly, ditch the Hagen test kits, they suck.
Next, I think the rule of thumb is about 1-1.5 of rock per gallon or something like that. Personally I'd go with more live rock than base but thats mostly because I'm impatient
whatever floats your boat. Pretty much everyone just goes for aesthetics these days anyways. I wouldn't go with less than 30 lbs.
I'm no good with the sand but theres a sandbed calculator around here somewhere......yes here it is:
http://reefcentral.com/calc/SandBed.php