Listen to me, and listen good...
Remove that five dollar damsel from your tank right now and flush him, return him, give him away... whatever..
The LR is all you need to cycle your tank, and beleive me, you don't wanna wait until your tank is all rock-scaped and stable to try to remove that hyper-agressive, territorial little prick like I did..
I tried for over a month to net my damsel after he killed the other damsel I had, and began terrorizing my new clownfish (who btw is bigger than the damsel was). This fish was so sharp that he ditched into the rocks if I even came NEAR the tank with a net. He laughed at the traps I devised and attempted, avoiding them as if he knew exactly what their purpose was..
Eventually, I had to tear down my entire tank in order to net him, removing nearly ALL my rock, stirring up a ton of sediment, turning my perfect water to milk, and causing a NO3 spike after I had been enjoying near-perfect water quality..
Don't do what I did... stock only the animals you wish to keep forever, and research the behavior of your choices carefully before adding them to your beloved reef.. removing them later can be a frikkin nightmare...