Weird yellow worm living in zoanthids

[Abzdot]

Hi,

 

I got these zoanthids around 10 days ago and their condition has been deteriorating, this is my first coral and all of my water parameters have been ok except my salinity which went up to 1.028 but then reduced it back down to 1.023-24.
 

I did not dip the corals but I did acclimate them for 30 mins

[Tired]

It looks like a spaghetti worm arm. Are there multiple thread arms like that? Spaghetti worms are harmless, but can irritate corals into closing by touching them too much.

 

You want to hit 1.025-1.026 for your salinity. What are your other parameters? Nitrates and phosphates should be above 0 or corals will starve.