Ahem,
...nitpicking...
Those are algae, not plants. There are very few truly saltwater plants.
Sorry.
Brandon,
I think you would benefit from a good book. There's a lot of advice that we won't be able to give you at a moment's notice, and it will be handy to have a book around.
I'll give you an example: My first SW tank was a 29 gallon. I did everything right from the start, mixed up some salt, calibrated the salinity and temperature, added some live rock, added a skimmer, and waited 6 weeks to add my first fish. I then tested my water, and everything checked out "OK". I added fish after fish that died within two or three days. I explained my story to LFSs, friends, etc, no one could figure out what was wrong. It took me around 6 dead chromis to figure out that I never dechlorinated my tap water, and the fish were simply dying from chlorine in the water...duh!
Looking back on it, it sounds like just about the stupidest thing I could have done, but at the time it didn't even occur to me. My point here is that we do dozens, if not hundreds, of things to our tanks that seem like second nature to us, but that aren't obvious if you've never kept a tank before. A good book like Ron Shimek's "The Reef Aquarium" or John Tullock's "Natural Reef Aquariums" is a great investment to save yourself from such costly mistakes.
Matt