SushiGirl
Premium Member
To tell you the truth, I would remove the daisy polyp rock as this seems to be where the hitch-hiker (my bet: eunicid worm) is hiding out. I don't think traps are very effective on eunicid worms since their tails don't usually leave their burrows, and if it is by chance a spearing mantis, they are often too smart to fall for traps. Remove the culprit by removing the rock. Flush the rock with club soda to get the culprit out of its lair. If you are unsure what rock the sucker is in, then stake out your tank at night with a red flashlight until you see the bugger then watch where it heads home to. Then you'll know exactly where it is in your tank.
^^That. Thought I had seen that suggested already. Get a piece of shrimp or something & put it close to the rock & do a stakeout to see if you can see it. Then if that's what it is you can either try a trap (there's a thread on here somewhere about a worm trap) or you can remove the rock & flush it out like Cloudburst said. Some people have even broken open rocks to get them out.