What is this black spot on my bubble tip?!

[cnjcpb]

Help! I noticed what looks like black spots on a few tentacles of my rose tip bubble nem. It looks like the tentacle is dying. Does anyone know what this is?

 

[Reef Wizard]

Help! I noticed what looks like black spots on a few tentacles of my rose tip bubble nem. It looks like the tentacle is dying. Does anyone know what this is?

While I dont know what this is per say

However I did have a few tentacles on my torches look darker than normal because they were smaller ones that just starting growing to split. The tentacles absorb water causing them to expand and appear lighter.

Once the torch grew all went back to normal.

Does it appear like its splitting or did recently?

 

[RedReefer]

Nem looks bleached. Sand looks too clean. Maybe target feed nem 2-3 times weekly. See if nem improves. Looks unhappy

 

[cnjcpb]

Nem looks bleached. Sand looks too clean. Maybe target feed nem 2-3 times weekly. See if nem improves. Looks unhappy

I just moved. The sand is about 30 days old. Rock and tank is about a year.