Here are the results of my search for filter plants.
Marginals:
Cattail* Typha lataifolia (produces seeds)
Monkey Flower* Mimulus (part shade)
Southern Blue Flag* Iris versicolor
Water Celery* Vallisneria spiralis
Water Parsely* Oenanthe javanica (varigated)
Yellow Flag* Iris psuedacorus
Floaters:
Duckweed* Lemna minor
Water Cress* Nasturtium officinale
Water Hyacinth* Eichhornia crassipes (tender)
Water Lettuce* Pistia stratoites (tender)
Now I just have to see if they work.
Thanks to all who replied.
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