And in addition yes you can start off with partial live rock and some base rock, it will eventually seed the base rock and make it "live rock" it will just take a bit longer to get the full benefit of it.
In my 75 gallon I went with 60 lbs base rock and 30 lbs of new sand, then added 40 lbs of "live sand" (from another tank) and another 65 lbs of live rock (From same tank), about two months later, it's hard to tell apart......
Didn't really get much of a cycle either, if any and eveything is doing very well, except a little more algae that I want, but I'm also using tap water until next week the all changes and top offs will be with RO water.
Hope this answers most of what you were asking......
Have fun
TJ
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75G, 100 lbs LR, Inwatter Stingray LED's, 25 Gallon Sump, 24wt UV, hermits, Snails, pep, fire & cleaner shrimps, Blue Throat Trigger, Perc Clowns , Yellow Tang, Coral Beauty, Blue Regal tang, RBTA, Coral Banded Shrimp, Checkerboard Wrasse, Many Corals, Royal Tux Urchin
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