Doesn't sound like anything too bad at all...I’ve used 3 different sources. Salty Bottom, Gulf Live Rock and KP Aquatics. Each has their pluses . Gulf and Salty Bottom did a few aiptasia but we’re still pretty clean of bad hitchhikers. KP cleanest of the bunch. No bad guys at all. All in all I’ve gotten a few pistol shrimp, bunches of brittle stars and a few mithrax crabs, pencil urchin, bristle worms(I don’t mind em), a a few cup corals and small fan worms. Still need a bit more live rock for my 60 gallon upgrade . Thinking of Tampa Bay Live Rock , heard lots of good things about them.