If I may add my two cents, I also got the bad advice concerning adding damsels to a new tank to help cycle it. Two things happened, Marine ick was added to the tank and never left until the tank was empty for a month. The second point, damsels are so aggresive I was never able to add anything else until they were sent back to the LFS as they already had set up their territories. There is a reason many of the damsel species are considered inch for inch, some of the most aggressive fish on the reef. Even some of the milder species can yield big trouble.