Gross man. Chuck that shit.
you legitimately have some unknown substance floating in there.... Why risk that shit.... You can get an Abcess just from extra water getting trapped in the muscle; imagine what could Happen from unknown shit (infection? Abcess? Combination?)
I did an Olympus cycle a while back of prop and Mast P. It was gtg.
looks like the ink from a rig...
Looks like the septum is disintegrating (The rubber piece )
Thats possible.. I have pinned the stopper around 20 times. It doesn't look all beat up though