Hi all, I have a 450L tank with 2x oase biomaster thermo 850 supplying filtration. They're fitted with standard coarse and medium foams with the bulk of the trays taken up by Seachem Matrix. At the top I have bags of Purigen and Carbon Matrix. I feel like I need more mechanical filtration to polish the water. If I put filter floss pads in at the top will I still have adequate flow? It's a heavily plated tank and still very new.