hi there....im new to this forum...and new to having a saltwater tank. not real sure if this is an "appropriate" place to post this, but hopefully it will be ok
my boyfriend and i have a 140 gal tank with a 20+ gal sump tank, great set-up, great lighting, etc (at least we think so), aquired it from a friend for a GREAT deal and have since tried our luck at creating a beautiful tank....i feel like we're struggling. neither one of us have ever had a salt water tank but we've both had an interest so we figured why not? we got the tank set up, threw in some live sand, let it circulate and establish itself for 3-4 weeks before putting in some "starter" fish...we have some damsels and cardinals and a couple other "cheap" fish. we had those fish for a few weeks, then went out and bought some prettier/more expensive fish....(too soon in my opinion)...our tank hadn't yet really established itself and 3 out of the 4 we bought wound up belly up.
needless to say, we're coming across a few un-forseen problems. first off...this "belly up" fiasco happened a month or so ago...and our tank got all scummy around the same time (i hear this is normal??)...a couple of days ago we went and bought a few more fish (less expensive, but just as pretty) and are trying our luck again. they all seem great at this point in time, but im really worried that they are going to die. our "starter fish" are still going strong, so how can we get to the point where the fish that we really want to live WILL live??

this leads to our next problem....these "starter" fish probably should have not been purchased....they are ugly and territorial, and downright mean. i want to flush them....but cant catch them to save my life. we have one imparticular that is a blue velvet, or neon velvet or something like that....its black with blue stripes. anyways, he's mean as can be...and i'd love to get rid of him. any tips on catching fish???
my last and final problem is the one im really hoping to have some help with....our tank is beautiful, but given that we have never had a tank, we don't have it set up very nice....to me it looks like the decor has just been thrown in and is really not that pleasing to the eye. i was hoping to hire someone to come in and "set up" our tank as a surprise to my boyfriend for valentines day....any suggestions?? anyways, thank you for letting me join your forum and i really appreciate all the help i can get with this....as i am truly a total novice!!!!