Some of my Great White Shark settled to the bottom because its primarily an inert clay powder with bacteria amongst other microbes. This clay or what I believe to feel like clay is just the small accumulation. So because it was powder it naturally sank to the bottom and settled down into mini piles.
If you fill panty hose with desired amount and let it soak like a tea bag it might help you out with sediment build up.
If your open to advice I would highly recommend using great white during early phases when you can lift the plant easily and sprinkle on the roots directly. After they have a good established root mass, try switching to Orca. Same company. Newer product, much less expensive, and its a liquid formula with zero sediment.
I personally feel great white is overpriced compared to other inoculation products out, while having limited edge on competition if any.
If you have a compost pile, look into fungus teas as well. You can make your own with little to no effort. If you have any forest land where you live go find some established conniferous areas and take a few gallons of the soil underneath old growth. Take it home and mix it in you compost. You just jump started your inoculstion by 100 years of natural endo myccorhyzae... BAM
I would also argue that when using inoculation in dwc, it is more beneficial leaving some old solution in the setup. Keeps a few more microbes and bacteria present.