First You should pick up a few heaters with that much water. LR IMO
you should have a min of 1 lb per gallon. Adding extra to the fuge is a good idea also, base rock for the fuge will help save some money. Add all LR
before the cycle, bacteria needs a place to grow and that is where the LR
come into play. What do you plan on doing with the tank? reef, fowlr
?? Do a lot of reading on this site, there is a ton of good info out there. If you get LR
there may be enough die off to start a cycle if not a few cocktail shrimp form the supermarket will work to get things going. You can add the LS
before or after the cycle. I dought your going to add enough to make a big difference in the cycle.