I did a single density test on my water column and counted 30 in 0,2 ml.
There are around 570 000 cells / gallon in my tank. (150 000 / liter)
228 million cells are free swimming in my 400g system. (1500 liter)
I would estimate those are less than 1% of the total number of the dinoflaggellate individuals.
That leads to a minimum of 22 800 000 000 dinos living in my tank.
23 billion dinos. That's way more dinos in my tank than all the people in the world.
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