what strength powearhead do you have in there? i would suggest adding maybe 2 more, marine fish like a lot of current.
i really liked the robert fenner book, esp. because it includes a detailed account of the more common species of fish.
you need to start testing your water and watching the ammonia, nitrates, and nitrites. maybe you could do a test and then list your readings here? that would be a big help in adivising you.
also, 13 fish is a huge bioload for a brand new tank. you might want to consider returning maybe half of these fish until the tank is cycled (all the ammonia, nitrates, and nitrites read 0).
after your tank is cycled remember the general rule of stocking in a saltwater aquairum is 1 in of fhis to every 5 gallons of water. in other words, your tank can hold a total of 20 inches of fish. remember to take into account the adult sizhe fish you will keep too.
are you currently doing water changes? if so, how often and how much? you really should be, since you are cycling using live fish.
i too advocate the use of LR
. check into this site: www.liverocks.com
they have excellent merchandise and their LR
is usually fine to add right to the tank because it is shipped so quickly and there is little dieoff. also this is one of the best prices going. not only will this make your tank more attractive, it will help with filtration too by adding space for beneficial bacteria to grow.
keep us updated! we are always here to help.