I've lived with Bristleworms (some call them Fireworms) for years now. I just did a thorough cleaning with a boa syphon on the gravel substrate with freshwater dips of all my live rock for 10-15 seconds. Stuns the fuzzy creatures enough so you can pick them out of the puka's [holes for you not living in Hawaii] with a tweezer or just swish the rock and they fall right out! I must have removed 100 or so Wore double latex gloves to keep from getting stung. I thought I had gotten the population under control. I feed my tank every OTHER day to keep my fish lean and (as nature intended) hungry.
Now, 10 days later, it seems I have more worms than ever before. I wouldn't mind, but they keep pestering my cowry shell and I'm hopeful they won't mess with my collector hermit crab. Mr. Crab keeps some cool anenome's on his shell. So, last night, I designed and set a trap from YouTube, where you put air tube in the sides of a bottle and leave it on the sandbed. Watched worms crawl into the tubes, but left their butts hanging just far enough in the tube to crawl back out. A cube of frozen Mysis shrimp made them go toward the bottle.
With anticipation this AM, I checked the tank only to find the bottle wormless with every stitch of shrimp missing from inside. Those worms are so crafty! I'd love to think I could pull a drawstring and capture one at a time as suggested, but with literally more than 100 to eradicate, I need a trap what I can toss in and "set it and forget it" overnight. I read one post years ago about piercing an old film canister in such a way as to leave behind a conical shape with shards sticking out. The worms crawl into the puka[pronounced POO-ka] and when they try to back out, they get "stuck". Ever heard of that?
I want to get some Zoanthids, and haven't had much success with keeping them. They start to close and get smaller and smaller and then eventually disappear. Bristle worms are constantly in there crawling all over them. I figure I need to reduce my bristle-age to few to none before spending $$$ on some Zoas.
Ideas?