hitch-hikers

Hi there! New saltwater aquarists- just got set up and am finding a few undesirable hitch-hikers such as Asterina's, and bristle worms. What do I do with them? Flush them down the toilet? Take them back to the fish store? I just want to make sure I am doing the right thing. Thanks! :)

Hi I'm new, Just starting out with a 350 trigon for marine reef. We used to have 190 tropical and have gone on to this. earlier on this week we received some baby corals on rock and placed them in the tank, about 15 minutes ago I noticed what looked like a spider leg poking out of a hole in the...