The biofilm grows up. A sticky film begins to cover the inhabitants, small protists and some isolated larger paramecium-type protists. A consumption cycle repeats. Protists and bacteria increase until they reach a peak and the nutrition begins to thin. Then I add new nutrients and the population increases again.
https://youtu.be/MLz5aXi-rWU
Mature Biofilm
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Don Schaeffer - Senior Member
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