What could this be?

[John_A]

I was watching my tank and all of a sudden this started flowing through the tank I found a piece of whatever it is stuck to a power head

 

[luis angel]

To me it looks like leftover food from some coral but I could be wrong, Did you feed the corals before seeing that?

 

[John_A]

To me it looks like leftover food from some coral but I could be wrong, Did you feed the corals before seeing that?

No I am currently carbon dosing with Vinegar so I am wondering if some bacteria broke lose and got into the tank from somewhere kinda looks the same as the stuff stuck in my skimmer currently now that I look