When you say your fa is gone, are you referring to the floating stuff or the stuff on the bottom?
If your referring to the matts on the surface, my understanding is that they float because of the bubbles they make from photosynthesis. If you squeeze the matts and release the bubbles, it can sink until it makes more bubbles. If it came back to the surface, it is still doing it’s thing.
It probably didn’t die, so maybe no do crash in your near future.
