I waited 6 weeks to put anything in the tank (except live rock and sand..snails etc). I bought 2 chromas and 5 yellow damsels from some store and the chromas started gasping and died within 12 hours (it was part of a new shipment). The damsels were all breathing very quickly and have been dying slowly (they turn blue on the top and then croak). I have 1 left and he is turning blue
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I also added a (from a new shipment) a couple of clowns, a wrasse , a coral beauty and a sebae. The anglefish looked good, was eating and lasted 1 day...and the sebae keeps squiggling away and getting stuck in dark spots of the tank it is looking unhealthly.
I have my eye on another coral beauty and a couple of yellow tailed damsels that I am going to try. They have been in the store for just about 2 weeks and they seem to be breathing ok and look good.
I'm not hoping for a repeat performance.