I have just set up a new 10g tank for my DAFs. Substrate, gravel, plants, driftwood, rocks. I am using 2 Whisper filters (for 5g tanks, long story) and although the water is clearing up nicely, there is a lot of debris on the wood, rocks and substrate/gravel. Should I agitate the water to stir up and filter out the debris? All the "stuff" is probably from the plantings which settled before the filters could do their job. Suggestions?