Newbie needs help...

Nice article GRINS, very informative.

I am debating on whether to do the 10 gallon tank for my office or just use an existing 20 gallon long tank I have and find a place to set it up at home or maybe both. :)

I understand the rule of thumb for heating requirements and amount of live rock.

Is there a rule of thumb for the amount of substrate? Is it the same as LR, about a pound per gallon? I used that same rule of thumb for gravel in a freshwater setup I had.

With the LR I understand that it is a 'natural' filter but is it enough or would I need a very basic HOB filter? Or would the LR and a 'clean up crew' be sufficient enough?
 
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