You can have a nice pond in a shaded area.
It will be a benefit on keeping green water
at bay.
And you already know to keep the leaves and 'stuff' out.
Here is a list of plants that will do well in your
pond -

Shade tolerant marginals

* acorus graimineus Ogon

* any aquatic grass

* Bowles Golden Sedge

* any clover

* dwarf bamboo

* Flamingo (variegated Water Parsley)

* horsetail rush

* Japanese Ribbon Grass

* Parrot Feather

* Pennywort

* spike rush

* any Taro

* Water Parsley (green)


Flowering shade Tolerant Marginals

* Bog Lily

* Chameleon Plant

* Creeping Buttercup

* creeping jenny

* creeping jenny gold

* Japanese Bog Orchid

* Ligularia 'Othello'

* Lobelia- Cardinal Flower

* Marsh Marigold

* mazus reptans

* Primula (Candleabra) japonica

* Spider Lily

(compiled by Patrica Sample)
k30a