Both were filled at the same time with the same water, only one had oysters.
Oysters really help filter our open waters. Sadly, their mortality rate is going up bc of ocean acidification which makes it harder for them to form their shells (see more about it here). Which means fewer oysters for eating and grosser waters in general. Again, this is already happening.
But let’s keep acting like climate change isn’t a thing. -sigh-






