I was given an already established aquarium. The light hadn’t worked in a while so all the coral died. There are 2 fish and 1 hermit crab. A few days ago I discovered that there are multiple large bristle worms hiding in the sand/rocks. They ate the shrimp I added to the tank and I’m scared they’ll eventually eat the other fish. So I watched and waited to find one but I was unable to grab it (wearing rubber gloves) so I removed the rock that it was hiding in. I saw a video of a guy who soaked a rock in hot tap water to get the worms out so I did the same thing. But I think the guy from the video May have been the wrong person to listen to. So now I’ve removed one worm but I don’t know what I should do with the rock. I don’t want to put it back in a harm the fish and mess up the tank. Anyone have any ideas about what I should do so that I can safely add the rock back to the tank?