What's this?

[toomanymatts]

Any idea what this is? I found it in the first chamber of my 13.5 while doing a water change. Sucked it out with a turkey baster. I think I see two more smaller ones in there.

 

[Mattiejay6]

Pineapple sponge. Good guy

 

[toomanymatts]

Pineapple sponge. Good guy

Nice. I put it back where I found it.