as far as the sand goes, and this is average for me, 1lb per gallon gives me about 1 1/2 inches, so for your 4 - 5" i would say min 60lbs and then add if you need to. live rock is typically lb per gal. i tried dead rock with live rock and ended up replacing it. it just doesnt look right with everything else. the live rock is so important that it is more than just looks, and i mean you maybe get the dead rock for the third the price, but it does nothing for you aside from a filler. and i mean lots of times your live rock comes with free hitch hikers that are good. i've got a few corals that way. just my opinion though
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