1) I will be starting/cycling a new tank with Live-Rock. The TONGA rock
looks amazing
to me, but also looks like it has lots more sensitive stuff which would die
during the cycle.
Should I add Tonga Rock AFTER the initial cycling. Is there an
"extra-hearty" type of Live-Rock that
should be used for cycling?

2) Does a FOWLR tank sustain inverts such as feather
dusters,crabs,Stars,urchins, shrimp etc?

3)I have about 25 lbs of dead coral and rock left over from the good-old
days. Just curious---will organisms adopt it and start making it LIVE-ROCK
also, thereby increasing the natural filtration?

4) What is this Bio-Spira stuff? I dont feel comfortable with it. My wife
picked some up when she bought the tank. Will it aid in stabilizing the
tank? Is it "may help,may not, but cant hurt"---or should I just avoid
using it completely?

thanks for your time and patience