I have heard really good things about liverocks.com, and I think most recomend between 1 and 1.75lbs/gallon, so probably aboy 25lbs. It depends on how much open space you want.
Dustin, what you and everyone involved have done for this reefing community is amazing. I don't plan on ever keeping any SPS corals myself but thank you so much for the risk you took with the medication and time you put into this expiriment. Thanks Everyone!
Even though your water looks good through all the tests... I would wait another three weeks at least before I put anything in. Your SG is fine. most people seem to like between 1.023 and 1.025. If you want to lower it, just add a little more water.