A diatomite filtration product includes flux-calcined diatomaceous earth, wherein the diatomite filtration product has: (1) an intricate and porous structure of diatomite, (2) a zeta potential in a range of from about −1.0 mV to about −6.0 mV within a pH range of from about 3.0 to about 8.0, and (3) a centrifuged wet density in a range of from about 0.176 g/ml to about 0.256 g/ml.