I don't test on the regular either. Poly Stock is 18"-22, 8 characins, and 1 datnoid 6x2x26 / 1 FX5 / WC 5-6 days. Felt even at 13 polys that parameters were manageable. My experience is their one of the lowest producing bio load fish per size out there.
Yeah i think cichlids are much harder on the bio load.