well, my asterinas are pretty much gone so I bought the chocolate chip starfish and my LFS only had a pretty large one. the starfish is on the bottom upside down with the harlequin having dinner - how long do I leave the starfish in there? I've read where the shrimp will just eat the tentacles (for lack of a better word I can't think of at the moment) - it's kind of hard to tell if they are gone or not or does it become obvious? Please help! I certainly don't want to foul up my tank but want to make sure the shrimp is getting enough.