One concern is if these methods will work, what problems might they cause if the live rock is already “CURED”. I guess it could kill coraline algaes or anything else which is beneficial for the rock?
Ok those are bristle worms and a natural occurrence in live rock. They used to be considered bad for the tank as they were thought to eat coral. The new thinking is that they are good and serve a purpose stirring the sand and processing detritus. Im fairly sure these are what you have. They are a pinkish flesh color with whitish fury looking legs those are bristle worms, they can get large!! I have personally seen them 12 inches in length needless to say I got rid of it. Smaller ones do a good service to the tank. Other similar looking worms but different colors deep solid red are fireworms and will give you a very bad sting. These are more unusual to have and I would get rid of them if I had one. The opinion of bristle worms is changing… especially if you have sand. They are detrivores and do a very good job churning the sand. A few years ago, they were thought to eat corals etc. and its a possibility that they might, but if you use sand it is considered good to have bristle worms.
