Better to put Water Hyacinth or Water Lettuce in the BioFalls or in the pond
itself?

DO you have goldfish or koi....for koi I would keep them out of the main pond
until they multiply more....they koi will eat the roots of both lettuce and
hyacinth and stunt or kill the plants. Goldfish don't seem to bother them so
I put them right into the goldfish pond. Hyacinth like full sun best, and
lettuce likes some afternoon shade ( anyway here in the deep south) Jerri

http://www.fringeweb.com/Ponds/JerrisPond