Black spots on Leather

[Leadfooted]

Are these black spots from a critter or possibly my chalice attacking at night?

 

[saltyfilmfolks]

I would go with sting

 

[Leadfooted]

I would go with sting

Thanks and I moved it last night (not easy to say the least). Wish I knew these H.S. chalice's were such fast growers.

 

[cloak]

IME black is usually associated with necrosis. While it doesn't look all that bad, definitely keep your eye on it. Hopefully it won't be a problem though. GL.

 

[DMattisonMHR]

I Had something very similar not long ago. I want to say its stings but I also have a dark blue sponge in my tank and have been thinking it might be spores. So I'm not exactly sure.

 

[Leadfooted]

Do you have vermitid snails?
If you look close , the spots mine had were lesions that we from my Hollywood Stunner sweepers. I relocated and it healed up. Your spots don’t appear to be lesions but I may be wrong.