Aside from coralline algae, I've never gotten any algae on my live ocean rock tbh and even if you were unlucky enough (you have to be pretty unlucky) to get a mantis shrimp it's easy to remove from a 5 gallon tankNo I understand that. Worms, mantis shrimp, all the algae it comes with etc. I know the lobster would probably eat the worms though lol.