Flow certainly won’t bother cyphos, it’s just not essential as it is with some species. In a closed environment like an aquarium, there is always gonna be a certain amount of water movement when using power driven filters, but even air driven sponges & matter filters create water movement in their function of moving water thru the media for biological & mechanical filtration.
Even as deep water fish that live in areas of the lake devoid of current, fronts & gibbs do just fine in aquariums that have “current” from returns or wave makers used to move detritus to filter intakes.