I dont know about that filter. The few that I am aware of, need pressure to force through the small micron apertures in the filter. In which case the foot pump is useless. Other filters are for course materials and thus better suited to 'non-pressure' pumps.
This may answer your question as to whether to run the filter in line with the pressure or foot pumps.
If this does not help, then inline just after the tank selection.
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