02-26-2010, 11:43 PM
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Well with the ludwigea, wisteria, etc, they're stem plants.
All you do is cut the stem, and then you can strip leaves off of the bottom inch or two of the stem and plant it as a new plant.
As for the "particles"... not quite sure what you mean. If they're relatively large, (individual leaves or something) I'd just let them go in the filter and get sucked in, then clean the filter.
If they're too tiny for that, then I wouldn't worry about it. If your tank is established, they'll basically "compost" in the aquarium, and release their nutrients back into the water, which will be absorbed by the plants.
Let me know if you need more help.