[Delphinus]

Quite honestly, you don't need to. Only get the damsel (or other) fish if it's a fish you want to keep anyways. The best thing to do, in my opinion, is just get a bunch of live rock. Throw in the rock, and the tank will cycle. Heck with a few pieces of rock I doubt you'd really need to wait much longer than a couple of weeks before you could introduce your first fish into the tank.

For my first reef tank, being the impatient newbie, I of course didn't want to wait any amount of time longer than absolutely necessary, so, I tried this to speed things along (without adding fish): Take some household ammonia and add a drop a day for a couple of days. That will kick start a cycle too. You don't want to add a pile of ammonia all at once, what you want to do is simulate the accumulation of ammonia as if there was a live bioload, which would basically be a very small tiny amount being continuously added. I did this five years ago when I set up my first reef tank. Anyways after a couple of days the ammonia test kit indicated "lethal", but a week later it was undetectable. I should add that I don't even feel that even this procedure is necessary ... you're going to want live rock anyways at some point, so, why not add the rock now. It starts the cycle, and, I know this sounds geeky, but, it can actually be very interesting to watch just the rock and see all sorts of things sprouting from them for that first bit. It's very exciting to see your first copepod, or feather duster, or ... etc.

For me the live rock is the only way to go. Just my $0.02 ... 8)