I'm going to be running a couple of Oase Biomaster Thermo 350s on a new tank. Disassembling the filters now and it seems it might be a good idea to replace some of the sponges with more biomedia. I mean, I realize the sponges also act as biomedia, but with all those sponges and only one basket of "noodles" (do they still call them that?) it seems flow might get restricted quickly. I was thinking of keeping the top two sponges (one coarse, one fine) and then filling the bottom three baskets with their plastic biomedia. Anyone else here use these filters and have any input here?