What is this????

[maleks.reef]

My question is:
- Do you have room for another fish for pest control and if so, what size is the tank
IMO the first line of defence against an unwanted animal is the Dip then the second line is the natural killer

I only have 2 clowns right now & a cleaner shrimp. The tank is 34 gals with a DIY refugium and a HOB skimmer. Also, are we sure it is some sort of pest worm?

I'm having issues with 0 PO4, could that be it?

 

[maleks.reef]

I would like to add that the candy cane's skeleton is almost "shedding", or it looks like it at least. There is a translucent soft material that is incompletely surrounding the stem. Does this sound like something a pest would do?