What is this floating in my tank?

chunkyfrog wrote:And you could have gotten the one jug that went through the plant when something weird happened.
Stuff does happen. Sometimes once.

1+ Formerly I worked in the food processing industry for a decade and can say from experience that sometimes processing practices fail and stuff gets thru the quality inspectors... it's rare but always regrettable with somebody getting chewed out big time on the plant floor. Usually the blame gets passed down to somebody who's barely making minimum wage and uses a sponge/mop all day.