I've had my 10 gal set up for 1 month now. 12 lbs. live carribean and figi rock, 2 damsels, 1 condy, 1 bristle starfish, 5 snails, and a peppermint shrimp. My newest addition of live rock has an abundance of what looks like baby shrimp and a blue something living in it. Should I be worried about these hitchhickers?