No, the krausen has fallen when you have some foam, some ale showing. As long as an ale is fermenting, however slightly, there will be floaties. And sometimes beyond.
Remember one unassailable statistic, as explained by the late, great George Carlin: "Just think of how stupid the average person is, and then realize half of them are even stupider!"
"I would like to die on Mars, just not on impact." Elon Musk