Reading through posts I've noticed that almost no one seems to know the correct way to target feed feather dusters, coco worms, christimas tree worms, etc. These worms use small hairs on their crowns to create currents that pull water up from the
bottom and through the crown. If you add phytoplankton or anything else from above it will just be moved away from the worm by their own currents - the worm will not get any food. To properly feed these guys make sure the food is released below the crown. There's a good discussion on this at
http://www.advancedaquarist.com/issu...002/toonen.htm and illustrations of current movement through the crown at:
http://bugs.bio.usyd.edu.au/Polychae...d_feeding1.htm
http://www.wildsingapore.com/chekjawa/text/c312.htm