4 weeks after adding rocks and you're putting corals in? Bad idea.
You are going to fast IMO.
Certainly way too soon to have a starfish in there (missed that first time I posted in the thread), if there ever IS a good time...
The starfish is doing just fine in there, he's active and is doing a great job keeping the sand clean. According to what I've been reading and most forums Im ok with 1-2 small frag pieces like I have in there for the time its been wet.