Someone ID this for me

[africangrey]

This thing start stripping flesh on an acro that I acquired a week ago, doesn't seems like eggs from AEFW or red bugs. The process is kind of slow but I see this pest advance day by day in the past 7 days. Not sure if this will infest my whole tank.

I took the mass using a pair of tweezers and the texture is some sort of hard shell not soft to touch.

 

[Pife]

Looks like sand.

 

[Diana A]

+1 ^

 

[africangrey]

But it is eating away the tissue and leaving a trail of sand?

 

[nashorn]

Do you see it moving?

 

[africangrey]

no movement, many its some kind of snail, hopefully there is no trace of it in my tank as I threw this frag away.

 

[nashorn]

Was that the Rommel Sunset Frag ?

 

[africangrey]

No its a no name frag I got from LFS after the coral farmer's market, did a 10 minute quick dip using Coral Dip solution, still had this happen.