I made a culture of those once, but it looked a bit different. The jar had dead plants at the bottom, and when a very slight film formed at the surface of the water, the paramecia started swarming in clouds that would move downward like fog very quickly, and then billow back up to the surface.
Dommage la qualité vidéo est bien, le son aussi, les routes pareil, mais sa avance pas.... mais bon j'ai pas compris ce qui est marqué en commentaire? c'est peutetre pour sa.