I like the sponge filters in the HOB but to clear up that water a little quicker poly-fiber filter material might catch more of the particulates. Just be sure to turn off your filter when you are changing the poly-fiber or all the "stuff" goes back in the tank - lol!! I have tried Seachem Clarity in the past but to be truthful it doesn't seem to help with inorganic particulates.
75 Gallon, 2X55W AH Supply CF 8800K, 1XMarineland Doublebright, 2X Marineland 350 Magnum; 45 Gallon Tall, 96Watt AH Supply CF 6700K; 30 Gallon Long; Fluval F&P 2.0 36"/46W; 20 Gallon, 1X26W AH Supply LED kit; all with Press. CO2; (Calcined) Montmorillonite Clay
Greater Seattle Aquarium Society (GSAS)