fishoholic is absolutely right with any of these its hit or miss some do great jobs others do nothing depends on your system and what it offers to the breed of fish.for me lemon juice and a syringe has worked in the past with my newer tanks if its a small piece i just remove the rock and kill the anemone.some say boiling water or joes juice works well.i know people who have butterflies who eat it and barely pick at anything else but they have a bad rap
