No such thing as a stupid question.
I have never heard of the 1# LR per gallon. My rule of thumbs in the various reefs I have over seen have been more like 1:1 or 1:1 LR to h2o.
- I actually had 135# of rock in my 75g at one point. Really what you want to do with rock is two things...get it how you want it to look, and have an efficient use of space. (Create as many caves and hidey holes...ledges for corals ect as you possibly can, without taking up so much space that you restrict flow in your tank or make it look like a rock aquarium)
Damsels are sometimes used from the beginning and most likely will survive the process...but why do it? Your going to have uncured rock in there to complete the cycle, and then (if you follow my advice) will slowly stock your tank. (This wont take long with an aquarium of this size) Best to wait two weeks buy your damsel, and give it a better, happier time with you.
If you keep good tabs on your tank, breaking it down and moving it is nothing more than a big water change. Now your probably going to wash your sand w/saltwater because you will have disturbed the layers of nitrifying bacteria, and stirred up a lot of crap, but other than that its a big water change. Your tank will re-cycle, but with an aged filter and live rock, most everything will probably survive the move.
- DISCLAIMER: I have moved a lot of saltwater aquariums via this method...and it has worked well for me. Sooner or later you are going to lose some livestock. Do NOT make a habit of throwing your nano around.
You probably could add a small amount of freshwater waste water to "aid" the cycle..but once again. There is really no point. You would have to adjust for salinity, or use it as top of water, but trust me. Un-cured live rock will do the trick very well, in fact when you get your rock it will be important to have strong flow and filtration to get anything that is dying off the rocks (one would not be amiss to "dust" with a powerhead daily) and out of the water. After the die-off has ceased, and you have gone through the nitrogen cycle completely, and performed a waterchange you are ready to rock.