Particles filter

[blendest]

Hi. Any idea how to create the filter animation:

Several types of particles enter the filter, some are trapped in the filter section (red, blue) and a selected type of particle (green) travels to the tank outlet.
I’ve run out of ideas on how to make it look natural.

[Blender_Fun1 (Blender.Fun)]

the problem with “natural” is - that’s very subjective. Would be great if you could post a sample animation how you want it to look like e.g. from yt or whereever.