You could cook the rocks, but that's way overkill for this issue I think.
If you're really desperate - remove the rocks to another container with saltwater and use a scraper to scrape as many tubes off as possible. Give them a good rinse after so you don't introduce much decaying organics intot he tank after...
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"If you're gonna be dumb, ya gotta be tough."
Current Tank Info: 120 gal mixed reef
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