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Sounds like it. You can remove the rock and carefully twist them off. Do this after a water change and you can rinse the rock in the old water just to be safe after removal.
Today my LR arrive from LR.com. I took out of my tank the pcs of LR that had the bubble algae and removed it (but both broke in the process). I am rising the pcs of rock off in water from the tank that is excess from a water change. Is this going to be OK or will I have a breakout now?