Coco worm distressed?

[halcyon_diver]

i added a coco worm to my tank about 6 weeks ago along with a feather duster, i noticed a couple days ago that the top perimeter of the tube is a very bright white, unlike the rest of the tube ( almost 8 inches long) i assumed the worm was enlarging his home, the past two days his plume seldom is out and when it is out ..its not all the way out. i have it placed on the bottom of my tank, plenty of flow and fed the tank cyclopeze 3 times a week when i feed the fish and corals, the duster is doing fine and his plume is out almost all the time. any thoughts?
TIA
ammonia-0
nitrite-0
nitrate-0
phosphate- just a slight tint to the test color
dkh-10.19
cal-420
ph-8.1
temp-79.0
mag-1260

 

[halcyon_diver]

anyone have any ideas???

 

[halcyon_diver]

well...for whatever reason..im happy to say..my coco worm is out in full bloom, i guess they tend to have bad days too!!!

 

[chujai]

i find they are very picky with placement. too much flow they wont come out, too much light they wont come out, too close to anything it won tcome out... i had to move mine quite a bit before he stops being so shy.... i have him in a low flow, semi shady area with nothing around him haha