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If you don't have too many you can break/scrape them off. If you have any worm eating wrasses they might come by and take care of business after you break the big stalk. I have bumble bee snails in my tanks, whether or not they are helping I'm not really sure.If so, how do I remove?
If you can remove the rock from the tank, chip/chisel/grind the entire shell off the rock and rinse the rock in a container of tank water to make sure the snails are removed.If so, how do I remove?

