take all your rock out and dip it in fresh water. Same with all the corals. When you have done this vacuum the sand and do a very big water change. I have had to do this so many times now, and they are a pain in the ass.
The freshwater kills the worms instantly, so if you do it when the lights are off in the tank it should be easier, as they are usually dormant during the dark hours and seem to always hide on the rock or the glass at this time.
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Starting to put together a new tank for my new place.
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